TY  - BOOK
AU  - Spyers-Duran,Peter
AU  - Gore,Daniel
TI  - Economics of approval plans 
SN  - 0837164052
U1  - 025.2 SPY G  
PY  - 1972///.
CY  - Westport : 
PB  - Greenwood Press, Inc., 
KW  - Academic libraries
KW  - Acquisitions (Libraries)
KW  - Approval plans in library acquisitions
ER  -