Selling dynamics /
Allen, Robert Y., 1938-
Selling dynamics / Robert Y. Allen, Robert F. Spohn, I. Herbert Wilson. - New York : McGraw-Hill, c1984. - xx, 487 p. : ill. ; 25 cm. - McGraw-Hill series in marketing. .
Selling dynamics / Robert Y. Allen, Robert F. Spohn, I. Herbert Wilson. - New York : McGraw-Hill, c1984. - xx, 487 p. : ill. ; 25 cm. - McGraw-Hill series in marketing. .