00245nam a2200109Ia 4500008004100000041000800041082002200049100001000071245003600081260000900117300000900126211209s1968    xx            000 0 und d  aeng  a526.9 N68 DAV/FOO  aDAVIS  aSURVEYING: THEORY AND PRACTICE   c1968  a1096