TY  - BOOK
AU  - Uhl, Vincent W
AU  - Hawkins, A. W
TI  - Technical economics for engineers: problem solutions 
AV  - TA 177.4 U77.1971
PY  - 1971///
CY  - New York
PB  - American Institute of Chemical Engineers
KW  - Ingeniería económica
ER  -