00269nam a2200097Ia 4500008004100000082001400041100001400055245004800069260004400117300001000161240817s9999    xx            000 0 und d  a553.68 Jo  aAuden.J.B 0aBulletins of the geological survey of india  c1950a Calcuttab Govt. of india press.  a48 p.