000 00274pam a2200109a 44500
082 _a621.389
_bH14R COP.2
100 _aHall,John S.
245 1 _aRADAR AIDS TO NAVIGATION
260 _aNew York
_bMcgraw-Hill Book Company, Inc.
_c1947
964 _gCIRC
997 _a73371 s C
999 _c417891
_d417891