Kenneth Bressett
"Now, for the first time, in full color! The updated and revised seventh edition of this comprehensive guide spells out the official American Numismatic Association grading standards for each United States coinage series. Every coin minted since 1793, from half cents to gold double eagles to commemoratives, is studied in 384 pages of easy-to-follow text and photographs."
Official ANA Grading Standards for United States Coins (Official American Numismatic Association Grading Standards for United States Coins)