TY  - BOOK
AU  - Weir,Wilbert Walter
AU  - Gregory,R.W.
TI  - Productive soils
AV  - S591 .W4 1946
PY  - 1946///]
CY  - Chicago, Philadelphia [etc.]
PB  - J.B. Lippincott company
KW  - Soils
N1  - On cover: Revised; "Fifth edition."
ER  -