Reference works by subject
Popularity Index: 22
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1 site
Subtopics
17 subtopics
Engineering literature
References on Greek mythology
Pharmacopoeias
Numismatic catalogs
Herbals
Crime reference works
Anglo-Saxon reference works
Chemistry reference works
Music guides
Film guides
Dictionaries by subject
Travel guide books
Reference works in medicine
Sports reference works
Nautical reference works
Stamp catalogs
Road user guides
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