TY  - GEN
AU  - Skinner, Dennis
TI  - New Ventures Mathematics, Grade Seven: Understanding numbers 
SN  - 9780869252536
AV  - QA135.5 SKI 1980 
PY  - 1980///
CY  - Harare
PB  - College Press
KW  - Mathematics
N1  - title from cover
ER  -