TY  - GEN
AU  - Posavac, Emil j.
TI  - Program evaluation: methods and case studies 
SN  - 0137296657
AV  - H62.5.U5 P62 1980
PY  - 1980///
CY  - U. S. A.
PB  - Prentice-Hall
N1  - Includes bibliography: (p. 332-342) and index
ER  -