00307nam a2200109Ia 4500008004100000082001000041100001700051245007400068250000900142260003800151300000800189240913s9999||||xx |||||||||||||| ||und|| aCHA/A aManas Chanda 0aAtomic structure and chemical bond : including molecular spectrascopy aNULL bTata McGraw HillaNew Delhic2000 a506