SPECIAL COLLECT ore
Preston, Roger B “sce The postal history of Puerto Rico, by R.B. »P950 Preston and M.H. Sanborn. State College,Pa., »P92P American Philatelic Society, 1950. 100p. illus. 26cm. (American Philatelic Society Hand book series)
1. Postal service--Puerto Rico. 2. Postage stamps--Puerto Rico. I. Sanborn, McCleary H., joint author. IT, Title.