00769nam a2200229Ia 4500 58884 BIBL 20160527190710.0 740514s1974 nyua 00110 eng 73080716 0060115890 EVLG TX298 .G68 620 Graf, Rudolf F. 230365 Local How it works, illustrated: everyday devices and mechanisms by Rudolf F. Graf and George J. Whalen, and the editors of Popular science. Illustrated by Farmlett, Parsanti, & Wood. New York Popular science [1974] viii, 184 p. illus. 921004 Technology Popular works. 177431 Local Whalen, George J. joint author. 290551 Local 45014 45014 0 0 0 620_000000000000000_G736H 0 evl 123449 10 10 1 2016-05-27 84837 0 620 G736h 80000000679426 2016-05-27 00:00:00 r:58884 z:NCC:D 6