00298nam a22000977a 4500008004100000100002800041245006400069260003700133300001000170650002000180200319b           ||||| |||| 00| 0 eng d  aChaudhuri, Sudhir Singh10aChart work: basic concepts and miscellaneous calculations /  aMumbai:bApoorva Sasanka,c1977.  a311p. 0aNautical Charts