000 00314nam a2200121Ia 4500
008 211217s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
100 _aEcology
245 0 _aEcology: study of ecosystems
260 _bA H Wheeler
_aDelhi
_c1970
300 _ax,305p p.
942 _c1
999 _c149801
_d149801