00298nam a2200109Ia 450000500170000000800410001702000180005808200180007610000160009424500330011026000450014320250107154708.0241216s9999||||xx |||||||||||||| ||und||  a0 258 96792 7  a526.902 8 SMI  aSMITH, J.R. 0aOptical Distance Measurement  aLondonbCrosby Lockwood & Son Ltd,c1970