00298nam a22001097a 4500082001500000100001300015245005100028260003200079300003200111526003700143650000800180  a526.9bAHM  aAhmad, S  aSoulation of Problems surveying and levelling.  aLahorebNational Book Stall  aviii, 402p. :bill, :c4 Cm  a0b0c0d526_900000000000000_AHM  aMCE