Machlis, Leonard. Plants in action : a laboratory manual of plant physiology / [by] Leonard Machlis and John G. Torrey ; illustrations by Evan Gillespie. - San Francisco : W.H. Freeman, [1956] - Series of biology texts . Subjects--Topical Terms: Plant physiology -- Laboratory manuals.--Plant physiology -- Laboratory manuals. LC Class. No.: QK 711 MAC 1956