Who Was Who in the D'Oyly Carte Opera Company
- A directory, photo gallery, and biographical resource devoted to those who performed with the company between 1875 and 1982.
- http://diamond.boisestate.edu/gas/whowaswho/

Twentieth Century Opera
- A brief analysis of opera in the 20th century.
- http://www.infoplease.com/ce6/ent/A0860142.html

Opera Singers of Yesteryear
- Biographies and sound clips of many early 20th century operatic performers.
- http://bassocantante.com/opera/singers.html

Best Opera Singers of the '90s
- USA Today ranks the top 10 opera singers of the 1990s.
- http://www.usatoday.com/life/opera.htm