00369nam a22001457a 4500 4288 4288 200730b ||||| |||| 00| 0 eng d 914.1445 R974 3496 Ruther, R. A. Visual signal guide London Marine press 1950 50 p. 3.12 Signals and signaling BK 0 1 ddc 0 914_144500000000000_R974 0 12538 CL CL 1954-03-26 A. H. Wheeler 914.1445 R974 02074 2020-07-30 BK