000 00362cam a22001097a 4500
008 180718b1967 xxu||||| |||| 00| 0 eng d
082 _aK5x73 Un3pr
245 _aProgrammed learning
_cby Department of the Air Force, United States
260 _aWashington
_bGovernment Printing Office
_c1967
300 _a45+p.
700 _aUnited States. Department of the Air Force
999 _c500023
_d500023