TY  - BOOK
AU  - Posamentier Alfred S.
AU  - Stepelman Jay.
TI  - Teaching secondary school mathematics: Techniques and enrichment units 
SN  - 0-675-20422-4
U1  - 372.7 POS 
PY  - 1986///
CY  - London
PB  - Merrill publishing company
N1  -  Includes bibliographical references and index
ER  -