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Title: Not the hobby standard
Review: This claims to be an accurate price guide to US stamps, but it's not the one used by the vast majority of stamp collectors. If you want something that's more widely accepted, try the Scott catalogs. The Scott Specialized catalog for US stamps is THE standard catalog and price guide. Scott numbers and prices will give you a much better idea about the value of your stamps than this will. Most public libraries have a copy of Scott, and there is also a smaller, cheaper pocket edition.
