00370nam a2200133Ia 4500008004100000082001600041100001700057245002500074260004700099300000800146650001800154650004200172653002200214170901s1989    xx            000 0 und d  a552.5bV50T  aVerma, V. K. 0aAavsadi Shail-Vigyan  aChandigarhbHariyana Sahitay Academyc1989  a168  aPure Sciences  aScience of the earth and other worlds  aSedimentary rocks