TY  - BOOK
AU  - Lawrence, F. C.
AU  - Humphreys, E. N.
TI  - Marginal Costing 
U1  - 658.1553 
PY  - 1947///
CY  - London : 
PB  - Macdonald and Evans, 
KW  - Cost Accounting
N1  - NY
ER  -