"Circle Products - Copy Confusion " Market Reports Newsletter Vol. 2 No. 8 May 20, 1975 pg. 4 (Notes)
First Edition 1976: Cinéography 2: Master Index pg. 31,33,35
"Cross-Reference Plan Partially Scuttled" Market Reports Newsletter Vol. 4 No. 9 Nov. 12, 1976 pg. 1 (Notes)