Publishing History

This is a chart to show the publishing history of editions of works about this subject. Along the X axis is time, and on the y axis is the count of editions published. Click here to skip the chart.  This graph charts editions published on this subject.
Editions Published
Year of Publication


Prolific Authors

who have written the most books on this subject
Stone, Robert, 29 books
Johnny Molloy, 25 books
Ira Spring, 21 books
Bruce Grubbs, 20 books
Jeffrey P. Schaffer, 19 books
Ron Adkison, 19 books
John McKinney, 19 books
Erik Molvar, 18 books
Don Lowe, 14 books
Thomas Winnett, 13 books
Bill Schneider, 13 books
Tracy Salcedo-Chourré, 13 books
Harvey Manning, 12 books
Keith Stelter, 12 books
Michael R. Kelsey, 12 books
Barbara McMartin, 12 books
Ann Marie Brown, 12 books
Suzanne Swedo, 11 books
Kathy Morey, 11 books
Allen Riedel, 11 books
Gerry Roach, 11 books
Rhonda Ostertag, 10 books
United States. National Park Service, 10 books
Barnes, F. A., 9 books
Jim DuFresne, 9 books


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