TY  - BOOK
AU  - Gaytero, Reynaldo B.
TI  - Powerful mathematics shortcuts and techniques in multiplication: 30 techniques for all levels and for all times 
SN  - 9719195001
U1  - Fil 512.21307 G257 1996  
PY  - 1996///.
CY  - [S.l. : s.n.].
KW  - Mulitpication-Study and teaching
KW  - Mathematics-Study and teaching.
ER  -