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Robert H. Langworthy, Lawrence F. Travis III
Prentice Hall c1999 2nd ed
hardcover
Available at 3 libraries
edited by Belinda McCarthy and Robert Langworthy ; foreword by Donald J. Newman
Praeger 1988
Available at 5 libraries
Robert H. Langworthy
Praeger 1986
alk. paper
Available at 6 libraries