000 00245nam a2200097Ia 4500
100 _aGhai B S Ed
245 _aSymbiotic Nitrogen Fixation Vol 1
260 _bUSG Pub & Distr, Ludhiana
082 _aJ:1:41/N84.1/B16132
300 _app 190; 22*14
999 _c38466
_d38466