TY  - BOOK
AU  - Heisman Arnold
TI  - Managerial and engineering economics
T2  - Allyn and bacon series mechanical engineering, ed by Frank H Keith
U1  - X:80bD, L1 
PY  - 1971///
CY  - Boston
PB  - Allyn and Bacon     
KW  - ECONOMICS
ER  -