Hepner, Harry Walker, 1893-1984. Perceptive management and supervision; insights for working with people. - Englewood Cliffs, N.J., Prentice-Hall, 1961. - 528 p. illus. 24 cm. ISBN: 0136569919 LCCN: 61008025 LC Class. No.: HF5549 .H417 / .H417 Dewey Class. No.: 658