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Manual of Philatelic Judging, 4th ed. William H. Baueri ed. 297:80 Map Stamps of the World ATA HB104 196:48; 197:32 Maps on Stamps Checklist by David Wolfersberger 336:75 Maps on Stamps Checklist CartoPhilatelic Society 323:69; 2nd ed. 327:76-77 ... View Full Source
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