00549nam a22001577a 4500003000800000005001700008008004100025040002100066082001800087245009000105260004300195300002800238500006800266504004100334650001600375BD-DhUL20161115131624.0161115s1970    b  a|||| m||| 00| 0 eng |  aBD-DhULcBD-DhUL  a539.7223bSTU00aStudies on the long termvariation in the intensity of cosmic radiation /h[MS Thesis]  aDhaka : bUniversity Of Dhaka, c1970.  a41 p. :bill. ;c29 cm.  aThesis (MS )-- Department of Physics, University of Dhaka,1970.  aIncludes bibliographical references.00aCocmic rays