TY  - BOOK
AU  - Holden,John
AU  - Peacock,James
AU  - Williams,Trevor
TI  - Genes , crops and the environment
SN  - 0 521 43137 9
U1  - 631.5233 
PY  - 1993///
CY  - United Kingdom
PB  - Cambridge university press
KW  - Germplasm resources
ER  -