Answer: encyc

AnswerCrossword Clue
ENCYCRef. set
ENCYCReference on a CD
ENCYCMultivolume ref. work
ENCYCRef. book
ENCYCReference vol.
ENCYCReference bk.
ENCYCRef. work
ENCYCMultivolume ref.
ENCYCBritannica, for one: Abbr.
ENCYCAtlas shelfmate: Abbr.
ENCYCIt comes in volumes: Abbr.
ENCYCMultivolume ref., usually
ENCYCDict. shelfmate