TY  - BOOK
AU  - Kahn,Gilbert
AU  - Yerian,Theodor
AU  - Stewart,Jeffrey R.
TI  - Progressive filing
SN  - 070332258
U1  - 651.53 
PY  - 1969///
CY  - [Place of publication not identified] : 
PB  - McGraw-Hill
KW  - Filing systems
KW  - Indexing
ER  -