TY  - BOOK
AU  - Weaver, John W.
TI  - Root development of field crops
T2  - Mc Graw-Hill Publications in the Botanical Sciences
U1  - 581.43:633 F6 
PY  - 1926///
CY  - New York
PB  - Mc Graw-Hill
KW  - Roots(Botany),Field Crops
ER  -