A guide to the study of fresh-water biology /
Needham, James G. 1868-1957.
A guide to the study of fresh-water biology / James G. Needham [and] Paul R. Needham. - 5th ed., rev. and enl. - San Francisco, Holden-Day, c1962. - 107 p. illus. 23 cm.
62020742
Freshwater organisms--Identification.
Freshwater organisms--North America--Identification.
Freshwater organisms--Collection and preservation.
QH96 / .N4 1962
591.929
A guide to the study of fresh-water biology / James G. Needham [and] Paul R. Needham. - 5th ed., rev. and enl. - San Francisco, Holden-Day, c1962. - 107 p. illus. 23 cm.
62020742
Freshwater organisms--Identification.
Freshwater organisms--North America--Identification.
Freshwater organisms--Collection and preservation.
QH96 / .N4 1962
591.929
