Robert Heinich ...[et.al]. Robert Fisher ... [et al.] Robert Parker ...[et al.] Robert Kirkman ... [et al.] Robert G. Murdick ... [et al.]. Robert Anderson ... [et al.] Robert E.Ployhart ... [et al.] Robert J. Sternbery ... [et al.] Robert J. Friedman...[et al.] Robert J. Gorlin ... [et al.]