000 00262nam a22001097a 4500
082 _a621.381542 MAR'B
100 _aMARK, DAVID
_980448
245 _aBASICS OF PHOTOTUBES AND PHOTOCELLS
260 _aNEWYORK
_bJOHN F. RIDER
_c1956
300 _a128P
942 _cBK
999 _c585378
_d585378