00411nam a22001577a 4500 2185 2185 200215b ||||| |||| 00| 0 eng d 623.8909 H613 1772 Hewson, J. B. A History of the practice of navigation 1st Glasgow Brown,Son & Ferguson 1951 viii,270p. 22.08 Navigation BK 0 0 ddc 0 623_890900000000000_H613 0 5972 CL CL 1954-03-18 E. W. Steves 623.8909 H613 01786 2020-02-15 BK