by EDWARD KYLE,HAROLD, GEORGE HEILIG,CHARLES
Year of Publication 18.11.1971

by HEILIG; GEORGE CHARLES, EIDT; SCOTT H, WATSON; SPENCER C
Year of Publication 03.10.1978

by FOLEY; THOMAS C, MALPASS; DENNIS B, HEILIG; GEORGE CHARLES
Year of Publication 23.03.1976

by FOLEY, THOMAS CLAY, PASADENA, TEX., US, HEILIG, GEORGE CHARLES, LA PORTE, TEX., US, MALPASS, DENNIS BENEDICT
Year of Publication 10.03.1983

by CHARLES HEILIG,GEORGE, BENEDICT MALPASS,DENNIS, CLAY FOLEY,THOMAS
Year of Publication 02.01.1976

by DENNIS BENEDICT MALPASS, GEORGE CHARLES HEILIG ET THOMAS CLAY FOLEY
Year of Publication 09.01.1976