TY  - BOOK
AU  - Peter. B Clark
TI  - Planning important substitution
SN  - 0-7204-31689
U1  - 330 
PY  - 1970///
CY  - Amsterdam
PB  - North-Holland Publishing Co
N1  - Peter. B Clark: Planning important substitution.  Amsterdam.  North-Holland Publishing Co, 1970. 0-7204-31689--(330CLA)
ER  -