452 OCTOBER 12 lkientifir MEMININI1 lllll NUMBER II. HOW POSTAGE STAMPS ARE GUMMED. HOW POSTAGE STAMPS ARE PERFORATED ieuuiuii, scientific american, 1872-10-12
452 OCTOBER 12 lkientifir MEMININI1 lllll NUMBER II. HOW POSTAGE STAMPS ARE GUMMED. HOW POSTAGE STAMPS ARE PERFORATED ieuuiuii, scientific american, 1872-10-12
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