541 NAG, D . K . STUDIES IN PHYSICAL CHEMISTRY / / D . K . NAG & S . C . LODH. - 2ND ED. - CALCUTTA: : J . N . GHOSH,, 1972. 271 P.. : PAPER BACK 5478 , 5757-5758 / 1967 / 210 P / 6/-. : 11/- * CHEMISTRY - PHYSICAL. * LODH, S . C . * Title