Aquatic insects of California, with keys to North American genera and California species Usinger, Robert L. (Robert Leslie), 1912-1968 creator text book Berkeley University of California Press 1956 1956
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ENG Aquatic insects California Insects QL496 .U75 595.709794 https://www.biodiversitylibrary.org/bibliography/61952 271971 56058271 10.5962/bhl.title.61952 DLC