Operational mathematics
CHURCHILL, Ruel V.
Operational mathematics - 2nd ed. - N.Y. 1958 - 337p
CALCULUS, OPERATIONAL
CALCULUS, OPERATIONAL
517.7 C36O
Operational mathematics - 2nd ed. - N.Y. 1958 - 337p
CALCULUS, OPERATIONAL
CALCULUS, OPERATIONAL
517.7 C36O