Crossword puzzle clue "popular reference work"

Here are the possible solutions for popular reference work clue

Answer
Clue
Relevancy
dei
Clue
Opus ___ (Catholic teaching also called "the Work, work work work work")
Definition
DEUS, (Latin) god
wikipedia
Clue
Popular reference work
Popular online reference
indexes
Clue
Reference aids in reference books
Definition
INDEX, to provide with an index
tableofcontents
Clue
Reference reference
thejoyofcooking
Clue
Popular household reference since the 1930s, as it's commonly known
whoswho
Clue
Popular reference book.
wiki
Clue
Popular online reference, for short

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