Acknowledged authors
Greenwood,
Val D
wrote Researcher's Guide to American Genealogy. 4th Edition
comprising 796 pages back in 2017.
Textbook and eTextbook are published under ISBN 0806320672 and 9780806320670.
Since then Researcher's Guide to American Genealogy. 4th Edition textbook
was available to sell back to BooksRun online for the top buyback price
of $ 3.93 or rent at the marketplace.