W.D. Hummon

Gastrotricha (2010)
Strayer, David L., W.D. Hummon, and R. Hochberg. 2010. “Gastrotricha (2010)”. In J. H. Thorp and A.P. Covich (eds.). Ecology and Classification of Freshwater Invertebrates of North America. Third Edition, 163-72. Academic Press, Inc. http://www.caryinstitute.org/reprints/thorp_covich_gastrotrichs_2010.pdf.
Gastrotricha (2001)
Strayer, David L., and W.D. Hummon. 2001. “Gastrotricha (2001)”. In J. H. Thorp and A. P. Covich (eds.). Ecology and Classification of Freshwater Invertebrates of North America. 2nd Edition, 181-94. Academic Press, Inc.
Gastrotricha (1991)
Strayer, David L., and W.D. Hummon. 1991. “Gastrotricha (1991)”. In J. H. Thorp and A. P. Covich (eds.). Ecology and Classification of North American Freshwater Invertebrates, 177-89. Academic Press, Inc., Orlando, Florida.