TY  - BOOK
AU  - Martin,Hubert
ED  - Canada. Dept. of Agriculture. Science Service
TI  - Chemical aspects of ecology in relation to agriculture / 
U1  - 581.5 CAN 
PY  - 1957///
CY  - Ottawa : 
PB  - Queen`s Printer, 
KW  - Plant ecology
KW  - Agricultural chemistry
N1  -  Publication no.1015 of the Department;  Includes bibliography at chapter ends
ER  -