TY  - BOOK
AU  - Johnson, C.B..
TI  - Physiological Processes limiting plant Productivity / 
SN  - 0-408-10649-2
U1  - J3:93 
PY  - 1983///
CY  - London : 
PB  - Butterworths , 
KW  - Agriculture <Plant Productivity>
ER  -