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

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Prolific Authors

who have written the most books on this subject
John Flenley, 2 books
Thor Heyerdahl, 2 books
Steven R. Fischer, 2 books
JoAnne Van Tilburg, 2 books
Lenore Franzen, 1 book
Michael Capek, 1 book
Paul Bahn, 1 book
Jo Anne Van Tilburg, 1 book
Terry L. Hunt, 1 book
Eric Kjellgren, 1 book
Paul G. Bahn, 1 book
John M. Brown, 1 book
Kenneth Treister, 1 book
Catherine Orliac, 1 book
Thor Heyerdahl, 1 book
Terry Hunt, 1 book
Vincent H. Stefan, 1 book
George W. Gill, 1 book
Carl Lipo, 1 book