Crossword Genius

Geographic reference book (5)

Ross

I believe the answer is:

atlas

'geographic reference book' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for atlas that I've seen before include "collection of charts" , "Size of paper once" , "God" , "In Greek myth, a Titan made to support the heavens" , "Sky carrier - map book" .)

I've seen this clue in the USA Today and the Universal.
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