Vegetable Tanned Leather
- Extensive article about the history and development of leather tanning technology with vegetable abstracts. From Siegel of California.
- https://www.siegelofca.com/view_reference.asp?rid=6

Leather Finisher's Manual
- Extensive, two-page article about leather finishing techniques, materials, and properties testing. From Siegel of California, Inc.
- https://www.siegelofca.com/view_reference.asp?rid=11

Chrome Upper Leather
- Three-page article about the preparation of leather, and the chrome tanning process. From Siegel of California, Inc.
- https://www.siegelofca.com/view_reference.asp?rid=13

Sources, Detection and Avoidance of Hexavalent Chromium in Leather and Leather Products
- Technical report of the United Nations Industrial Development Organization, summarising the results of investigations about conditions conductive to or inhibiting generation of chromium VI in tanned leather. Prepared by: Christiane Hauber.
- http://www.unido.org/userfiles/PuffK/hexavalent.pdf

The Scope for Decreasing Pollution Load in Leather Processing
- United Nations Industrial Development Organization's study on the pollution load discharged in effluents during the leather tanning process, and the scope for decreasing that load. Prepared by: J. Ludvik.
- http://www.unido.org/userfiles/PuffK/L_scope.pdf

Mass Balance in Leather Processing
- United Nations Industrial Development Organisation paper, providing a comprehensive computation of the mass balance and the efficiency of the leather tanning process as an aid in the assessment of total waste generation. Prepared by: J. Buljan, G. Reich a
- http://www.unido.org/userfiles/PuffK/L_mass_balance.pdf

Hair-Save Unhairing Methods in Leather Processing
- United Nations Industrial Development Organisation paper about the ecological advantages of the hair-save unhairing technique in the leather tanning and processing industry. Prepared by: Willy Frendrup.
- http://www.unido.org/userfiles/PuffK/L_hairsave_unhairing.pdf

Formation, Prevention and Determination of Cr (VI) in Leather
- Paper from the United Nations Industrial Development Organisation, presenting an overview of recently published articles on the sources, detection and avoidance of hexavalent chromium in leather and leather products. Prepared by: Christane Hauber.
- http://www.unido.org/userfiles/PuffK/overview.pdf

Emission Estimation Technique Manual for Leather Tanning and Finishing
- Australian government approved manual describing the procedures and recommended approaches for estimating emissions from facilities engaged in leather tanning, processing and finishing, and in the production of fellmongered wool, pelt or slipe wool.
- http://www.npi.gov.au/handbooks/approved_handbooks/pubs/fleather.pdf

Chrome Management in the Tanyard
- Technical paper reporting on the environmental impact of chrome tanning, and the techniques most frequently used in order to reduce the amount of chrome in tanning wastewater. From the Uniter Nations Industrial Development Organisation. Prepared by: J. L
- http://www.unido.org/userfiles/PuffK/L_chrome_management.pdf

Chrome Balance in Leather Processing
- Technical paper about the environmental impact of the chrome tanning process, prepared by J. Ludvik as part of a regional program for pollution control in the tanning industry in South East Asia.
- http://www.unido.org/userfiles/PuffK/L_chrome_balance.pdf

Trade Development in the Leather Industry in Africa
- October 2002 report under the auspices of the International Trade Center about the commercial development of the African leather tanning and processing, and the leather goods manufacturing industry.
- http://www.unido.org/file-storage/download/?file_id=10199

Markets for Skins and Leather
- Comprehensive 2003 report providing an overview of the characteristics and world wide supply capabilities for emu, ostrich, goat, crocodile and camel skins and leathers to Australian producers and processors, prepared for the Rural Industries Research and
- http://www.rirdc.gov.au/reports/NAP/02-142.pdf

History and Process of Leather
- Short article about the history of leather and hide treatments, and current technologies for the tanning and processing of leather. From Canadian Contract Leathers, Inc.
- http://www.contractleathers.com/HistoryandProcess.pdf

The European Tanning Industry Sustainability Review
- May 2002 contribution of COTANCE to the World Summit on Sustainable Development, describing the principles of sustainable development as practiced and implemented by the European leather tanning and processing industry.
- http://www.uneptie.org/outreach/wssd/docs/further_resources/related_initiatives/COTANCE/COTANCE.pdf