000 00269nam a2200097 4500
245 _aIntroduction to chain indexing : programmed text
_cby T.D. Wilson
100 _aWilson, T.D.
260 _aLondon
_bClive Bingley
_c1971
300 _a85p.; 22 cm.
082 _aPC
_b029.54 WIL
999 _c70720
_d70720