- Behl, R.K. (1990). In: Summer Institute on Innovative Methdtls and Emerging Trends in Plant Breeding Research. HAU, Hissar.
- BUlion, G.w. (1952). In: Proc. 6th International Grassland Congress. 227-228.
- Dewey, D.R. and Lu, K.H. (1959). Agron. J. 51:515-518..
- Jibouri, HA (19.58). Agron. J. 50: 633-637.
- 176 INDIAN JOURNAL OF AGRICULTURAL RESEARCH
- Kulshresta, v.P. (1995). Crop Improv. 22: 200-206.
- Nayeem, K.A. and Mahajan, A.R. (1991). Indian J. Genet., 51: 363-369.
- Shah, M.A..(1998). Indian J. Agric. Res., 32: 105-110.
- Singh, RK and Choudhary, B.D. (1985). Biometrical Methods in Quantitative Genetics Analysis. Kalyani Publisher, Ludhiana.
- Sullivan, C.Y. and Ross, W.M. (1979). In:, Stress Physiology in Crop Plants. (Mussel, H. and Staples, R.C. Eels.) John Wiley & Sons Inc. New York: pp-263-281