000 00297nas a2200121Ia 4500
008 170101s2017 xx 000 0 und d
044 _aU.S.A.
245 0 _aINFOSYSTEM
260 _bRitchcock Publishing
_aWheston
270 _aRitchcock Publishing
362 _aJan - Dec,1972
942 _2ddc
_cP
999 _c168411
_d168411