00357nam a22001337a 4500003000400000005001700004008004100021020001100062040002500073100001900098245005800117260003700175300001100212OSt20260325161436.0260325b        |||||||| |||| 00| 0 eng d  a(pbk.)  cNVSU Library Bambang  aRider, Paul R.  aPlane and Spherical Trigometry vol. 1cRider, Paul R.  aNew York:bMasmillan Co.,c1971.  a137 p.