000 00342nam a2200133Ia 4500
008 140113s9999 xx 000 0 und d
082 _a577.4 L1
100 _a"Nair, N. Balakrishnan"
245 _aParisthitivijnanam
260 _b"Thiruvananthapuram : Kerala bhasha institute, 1971"
300 _a355p.
650 _aEcology
942 _cBK
999 _c62855
_d62855