Hanbook of Elementary Mathematics by M. Vygodsky

LINK ORIGINAL LIBRE EN LA WEB
https://archive.org/details/VygodskyElementaryMathematicalHandbook
LINK DIRECTO EN  PDF
https://archive.org/download/VygodskyElementaryMathematicalHandbook/Vygodsky-Mathematical-Handbook-B0018XY1MG.pdf
LINK ALTERNATIVO
http://www.mediafire.com/view/1277xv9pepdd1mb/Vygodsky-Mathematical-Handbook.pdf