4 1 10 Ludy T. Benjamin Primary Author J. Roy Hopkins Primary Author Jack R. Nation Primary Author mixed material 002308040x New York MacMillan Publishing 1987 Gene V. Glass Primary Author Kenneth D. Hopkins Additional Author mixed material 0205142125 Boston Allyn and Bacon 1995 Charles R Hopkins Primary Author Thomas B. Duff Additional Author Robert E. Gades Additional Author Dennis C. Lytle Additional Author mixed material 0024728608 California Glenco Publishing 1979 Barry Primary Author Hopkin Primary Author Baker Primary Author mixed material 0813427908 the interstate printers