Robert Petersen b.1945. We are offering this fine original limited edition Lithograph w/collage and handwork created by Robert Petersen in 1987. Signed and numbered by the artist. Printed at Styria Studio Inc., NYC. Title "CHART Series" 1983 It measures 31 x 42 approx. Robert Petersen was Robert Rauschenberg's assistant for many years. He has had shows at Castelli & Sonnabend Galleries among many others. Signed and numbered in pencil. Excellent condition