Applied business mathematics for consumer and business use Edwin B. Piper, Roswell E. Fairbank and Joseph Gruber. Piper, Edwin Bancroft. Fairbank, Roswell E., joint author. Gruber, Joseph, joint author. Curry, Preston Edmond, Business arithmetic. Business mathematics. 511.8 PIA Cincinnati : South-Western, 1970. 1970. 1970 Text x, 582 p.: eng