"Philip Silver"@en . . . . "Silver, Philip"@en . "1999Z"^^ . . "American philatelist" . . . "Philip Silver (1909\u20131999), of New York City, was a philatelist who specialized in the field of air mail stamps, known as aerophilately. He studied air mail stamps and postal history, and wrote extensively on the subject."@en . "1909Z"^^ . .