544.9 Zech P Zechmeister, Lészló, 1889- Principles and practice of chromatography by L. Zechmeister and L. Cholnoky. Tr. From the 2d and enl. German ed. By A.L. Bacharach and F. A. Robinson with a foreword by I. M. Heilbron. New York, J. Wiley, 1941. 362 p. ilus. 23 cm ´´Bibliography. Reference (to summer of 1938)´´: p. 325-339 --- ---- London, Chapman & Hall, 1950. 361p.