The biology of North American caddis fly larvae / by John Thomas Lloyd.

The life of inland waters : an elementary text book of fresh-water biology for American students / by James G. Needham ... and J.T. Lloyd.

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Lloyd, John Thomas, 1884-1970

Works from the collections

The biology of North American caddis fly larvae / by John Thomas Lloyd.

The life of inland waters : an elementary text book of fresh-water biology for American students / by James G. Needham ... and J.T. Lloyd.