United States Copyright Office, Catalog of Copyright Entries/Third Series… (1972)
“ MASSON, MARGARET.MASSON, MARGARET. Giant St. John's wort, from the 1945 Wildlife conservation stamps. See NATIONAL WILDLIFE FEDERATION, INC. Showy aster, from the 1945 Wildlife conservation stamps. See NATIONAL WILDLIFE FEDERATION, INC. Texas plume, from the 1945 Wildlife conservation stamps. See NATIONAL WILDLIFE FEDERATION, INC. MAUTONE, ROMOLO C. F.MAUTONE, ROMOLO C. F. The trisection of an angle by the sole use of a straight edge and compass. © 19May45; I-36278. Romolo C. F. Mautone (A) ; 30May72; R530021. ”
