TY  - BOOK
AU  - Levin, Richard  J
TI  - Planning and control with PERT/CPM  
SN  - 0070994080
U1  - 681.5:71 
PY  - 1981///
CY  - New Delhi
PB  - Tata Mc Graw Hill
KW  - 681.5:71
KW  - PERT
ER  -