Fresh-water invertebrates of the United States.

Eitemau Tebyg

• Freshwater invertebrates of the United states
  gan: Pennak, Robert W
  Cyhoeddwyd: (1953)
• Ecology and classification of North American freshwater invertebrates /
  gan: Thorp, James H.
  Cyhoeddwyd: (1991)
• Pollution ecology of freshwater invertebrates.
  gan: Hart, C. W.
  Cyhoeddwyd: (1974)
• Ecology and classification of North American freshwater invertebrates /
  Cyhoeddwyd: (2010)
• Keys to palaearctic fauna : Thorp and Covich's freshwater invertebrates. Volume 4,
  Cyhoeddwyd: (2019)