The Property Classification Method of File Design and Processing CACM August, 1962 McGee, W. C. CA620835 JB March 17, 1978 9:03 PM 1135 4 493 1136 4 493 493 4 493 2710 4 493 2765 4 493 2888 4 493 2906 4 493 729 4 493 1136 5 493 493 5 493 493 5 493 493 5 493 616 5 493 493 6 493 616 6 493 657 6 493