Mike Byrnes
US$13.26

Mike Byrnes & Assoc.
US$36.95

Contribution by Research
US$13.56

Ken Scharnberg
US$9.56

Robert M. Calvin and
Marilyn M. Martin
US$6.95

Professional Truck Driver Institute
US$39.95

Michael H. Belzer
US$35.00

Jeffrey J. Woltman and
Sheena Petitt Woltman
US$19.95

Hy Hammer (Editor)
US$11.96