000
00244nam a2200097Ia 4500
100
_a
Simmonds N W & Smartt J
245
_a
Principles Of Crop Improvement
260
_b
Blackwell Sci Pub, U K
082
_a
J38:6/N99/B22958
300
_a
pp 412; 25*18
999
_c
2519
_d
2519