TY  - BOOK
AU  - Hartkemeier H P
TI  - Principles of punch-card machine operation: how to operate punch-card tabulating and alphabetic accounting machines
U1  - 651.2646 
PY  - 1942///
CY  - New York
PB  - T.Y.Crowell
KW  - Punched-card machine oeration
KW  - Statistical machine
ER  -