SPECIAL
COLLECTIONS Philadelphia. National Philatelic Museum.
“SoG Fiftieth anniversary, American Philatelic -P949 Society Philadelphia Chapter 18. Philadelphia, .P53M National Philatelic Museum [1954]
v.6 471-502p. illus. 23cm. (Its Official bulle-
no.4 tin, v.6,no.4)
I. American Philatelic Society. Philadelphia
Chapter 18. & -