TY  - BOOK
AU  - Johnston, C. L.
AU  - Willis, Alden T., (Hughes, Gale M.)
TI  - Development mathematics
SN  - 0-534-07980-6
U1  -  512.9 
PY  - 1987///
CY  - California,USA
PB  - Wadsworth
KW  - Algebra
ER  -