00261nam a22001097a 4500003000400000008004100004082001600045100001600061245002600077260004000103300000800143OSt231215b        |||||||| |||| 00| 0 eng d  a574.5bV98E  aVyas, A. B.  aEcological Principles  aJaipurbInternational Sciencec1975  a127