by WAFER, JOHN A, SALETTA, GARY F, ENGEL, JOSEPH C, ELMS, ROBERT T
Year of Publication 13.02.1987

by WAFER, JOHN A, WILSON, JOHN T, ENGEL, JOSEPH C, ELMS, ROBERT T
Year of Publication 13.02.1987

by WAFER, JOHN A, MATSKO, JOSEPH J, ENGEL, JOSEPH C, MERCIER, BERNARD J
Year of Publication 28.11.1986

by JOSEPH C. ENGEL, GARY F. SALETTA, ROBERT T. ELMS, JOHN A. WAFER
Year of Publication 18.09.1986

by SALETTA GARY F, ENGEL JOSEPH C, ELMS ROBERT T, WAFER JOHN A
Year of Publication 10.09.1986

by ENGEL JOSEPH C, ELMS ROBERT T, WAFER JOHN A, WILSON JOHN T
Year of Publication 03.09.1986

by HILL ROBERT H, STEPHENSON WILLIAM I JR, WAFER JOHN A
Year of Publication 07.05.1986

by JOSEPH J. MATSKO, JOHN A. WAFER, JOSEPH C. ENGEL ET BERNARD J. MERCIER
Year of Publication 04.04.1986

by BERNARD J. MERCIER, JOHN A WAFER, JOSEPH J. MATSKO, JOSEPH C. ENCEL
Year of Publication 18.07.1984

by WAFER, JOHN A, SALETTA, GARY F, ENGEL, JOSEPH C, ELMS, ROBERT T
Year of Publication 27.09.1983

by WAFER, JOHN A, MATSKO, JOSEPH J, ENGEL, JOSEPH C, MERCIER, BERNARD J
Year of Publication 27.09.1983

by WAFER, JOHN A, MATSKO, JOSEPH J, ENGEL, JOSEPH C, MERCIER, BERNARD J
Year of Publication 12.07.1983

by WAFER, JOHN A, WILSON, JOHN T, ENGEL, JOSEPH C, ELMS, ROBERT T
Year of Publication 12.07.1983

by JOSEPH C. ENGEL, GARY F. SALETTA, ROBERT T. ELMS, JOHN A. WAFER
Year of Publication 10.05.1983

by BERNARD J. MERCIER, JOSEPH C. ENGEL, JOSEPH J. MATSKO, JOHN A. WAFER
Year of Publication 10.05.1983

by SHIMP; ALAN B, BEATTY, JR.; WILLIAM E, WAFER; JOHN A
Year of Publication 09.11.1982

by MATSKO; JOSEPH J, WAFER; JOHN A, ENGEL; JOSEPH C, MERCIER; BERNARD J
Year of Publication 21.09.1982

by WAFER, JOHN A., BEAVER, PA., US, MATSKO, JOSEPH J
Year of Publication 19.08.1982

by WAFER; JOHN A, ELMS; ROBERT T, ENGEL; JOSEPH C, WILSON; JOHN T
Year of Publication 06.07.1982

by MATSKO; JOSEPH J, WAFER; JOHN A, ENGEL; JOSEPH C, MERCIER; BERNARD J
Year of Publication 15.06.1982