00370nam a2200145Ia 4500008004100000020001600041082001600057100001700073245002400090260005400114300000800168650001800176650001800194653001200212170901s1979    xx            000 0 und d  a070690754 X  a574.5bB83E  aBhardwaj, N. 0aElements of Ecology  aGhaziabadbVikas Publishing House Pvt. Ltd.c1979  a201  aLife sciences  aPure sciences  aEcology