TY  - BOOK
AU  - Helmer,Ray G.
ED  - American Society of Civil Engineers
TI  - Time management: For engineers and construction 
SN  - 0872627934
AV  - TA157 H45
PY  - 1991///
CY  - New York, new york
PB  - American Society of Civil Engineers
KW  - Ingenieros
KW  - Tiempo
KW  - Administracion
ER  -