00251nam a2200097Ia 4500008004100000082001600041100001600057245003900073260003300112300000800145170901s1974    xx            000 0 und d  a631.5bI-5P  aSethi, G.R. 0aImproving Crop & Animal Production  aIBH, PatnabOxford IBHc1978  a629