Answer: endnotes

AnswerCrossword Clue
ENDNOTES

Article addenda

ENDNOTES

Explanatory text additions

ENDNOTES

Back-of-the-book listings

ENDNOTES
Chapter postscripts
ENDNOTES
Term-paper references
ENDNOTESLiterary wrap-up
ENDNOTESWhat some scholarly texts (and the 10-Downs to all the starred clues) have
ENDNOTESAcademic references
ENDNOTESNotable features of David Foster Wallace books
ENDNOTESChapter explanation, e.g.
ENDNOTESBack-of-book material