Dòng Nội dung
1
Crop production lecture supplement for Agronomy 1213, Oklahoma State University : Revised printing.
Dubuque, IA : Kendall/Hunt Pub. Co., 1998.
307 pages : illustrations, maps ; 28 cm
2
Crop productivity and sustainability : shaping the future, proceedings of the 2nd International Crop Science Congress / organized jointly by the National Academy of Agricultural Sciences of India and the Indian Council of Agricultural Research ; editors, V.L. Chopra, R.B. Singh, Anupam Varma.
New Hampshire : Sciences Publishers, 1998.
xxviii, 63, 1111 p. : ill., maps ; 25 cm.

Congress was held at New Delhi, India in 1996.
3
Genes, crops, and the environment / John Holden, James Peacock, and Trevor Williams.
Cambridge ; Cambridge University Press, 1993.
xiii, 162 p. ; 24 cm.
4
Plants in agriculture / J.C. Forbes, R.D. Watson.
Cambridge [England] ; Cambridge University Press, 1992.
xv, 355 p. : ill. ; 26 cm.