credit in a footnote: crossword clues

Matching Answer
Confidence
CITE
60%
IBID
53%
ETAL
43%
OPCIT
20%
IDEM
20%
CIT
20%
UNIT
20%
LOC
20%
ETSEQ
20%
IOU
20%
e.g. Greek Cheese
e.g. O?D (Use ? for unknown letters)