TY  - BOOK
AU  - Donald P. Hopkins
TI  - Chemicals humus, and the soil : A simple presentation of contemporary knowledge and opinions about fertilizers, manures, and soi
U1  - 631.41 
PY  - 1957///
CY  - London
PB  - Faber and Feber Ltd
N1  - Donald P. Hopkins: Chemicals humus, and the soil : A simple presentation of contemporary knowledge and opinions about fertilizers, manures, and soil fertility.  London.  Faber and Feber Ltd, 1957.--(631.41HOP)
ER  -