000 00255pam a2200109a 44500
082 _a621.08
_bM18M NO.32
100 _a
245 1 _aGRAPHICAL SPRING DESIGN
260 _aLondon
_bThe Machinery Publishing Co.
_c1962
964 _gCIRC
997 _a2149 s C
999 _c415940
_d415940