100 ways to use your pocket calculator /
Buckwalter, Len
100 ways to use your pocket calculator / Len Buckwalter. - Greenwich, Conn. : Fawcett Publ., Inc., 1975. - 124 p.
Fine mechanics
100 ways to use your pocket calculator / Len Buckwalter. - Greenwich, Conn. : Fawcett Publ., Inc., 1975. - 124 p.
Fine mechanics