The theory and practice of semimicro qualitative analysis / by G. B. Heisig. Semimicro qualitative analysis. Heisig, Gladstone Bering, 1893- Microchemistry. Chemistry, Analytic Qualitative. QD98 .H45 1950 544 HET Published in 1940 under title: The theory and practice of qualitative analysis. Bibliography: p. 319-320. Philadelphia : Saunders, 1950. 1950. 1950 Text 356 p. : eng