6 1 20 Leroy F. Imdieke Primary Author Ralph E. Smith Primary Author mixed material 047150419X Toronto John Wiley & Sons 1991 Imdieke Additional Author Smith Additional Author mixed material 0471819042 Canada John Wiley & Sons 1987 CamScanner_01-19-2022_07.39_114.jpg.jpg Leroy F Imdieke Additional Author Ralph E Smith Additional Author mixed material 0471808296 New Jersey John Wiley & Sons, Inc. 1987 Leroy F. Imdieke Additional Author Ralph E. Smith Additional Author Andrew A. Haried Additional Author mixed material 0471518239 United States of America John Wiley & Sons, Inc. 1991 John G. Helmkamp Additional Author Leroy F. Imdieke Additional Author Ralph E. Smith Additional Author mixed material 0471614246 USA John Wiley & Sons, Inc. 1989 John G Helmkamp Additional Author Leroy F Imdieke Additional Author Ralph E Smith Additional Author mixed material 0471613622 New Jersey John Wiley & Sons, Inc. 1989