The Surveys and Commentaries are a part of the separately paginated INTRODUCTION to the volume and are paginated accordingly.
(Introduction pp. 501-526)
1. Earlier General Bibliographies for the Grand Canyon and Colorado River
2. Comparable Bibliographical Productions for National Park Service Units
“A necessary nuisance”— The Traditional Bibliography in a Digital Age (Introduction pp. 527-546)
How Many Voices Unheard? The Choir of Gray Literature in Bibliography with examples from THE GRAND CANON (Introduction pp. 547-568)