TY  - BOOK
AU  - Waksman,S.A.
TI  - Humus : : origin, chemical composition, and importances in nature / 
U1  - 631.41 WAK 
PY  - 1938///
CY  - Baltimore : 
PB  - Williams & Wilkins, 
KW  - Humus
N1  -  First edition, Janurary, 1936; second edition, July, 1938;  Includes bibliographical references (p. 430-511)
ER  -