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  | | Fatherhood(Reprint) Evolution and Human Paternal Behavior by Peter B. Gray, Kermyt G. Anderson Paperback, 320 Pages, Published 2012 by Harvard University Press ISBN-13: 978-0-674-06418-8, ISBN: 0-674-06418-6 |
 | | Fatherhood Evolution and Human Paternal Behavior by Peter B. Gray, Kermyt G. Anderson, Harvard University Press Hardcover, 320 Pages, Published 2010 by Harvard University Press ISBN-13: 978-0-674-04869-0, ISBN: 0-674-04869-5 |