TY  - BOOK
AU  - Mccall, James A.
AU  - Herndon. Mary A.
TI  - Software maintenance management
T2  - NBS special publication 500-129
U1  - 001.6425 
PY  - 1985///
CY  - Washington
PB  - U.S. department of commerce
N1  - Computer science and technology
ER  -