The Ladder series
Macfadden-Bartell
Thomas G. Aylesworth ; adapted by Jocelyn W. Franklin
MacFadden-Bartell Corporation , Yohan 1972, c1970 The Ladder series
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Robert N. Webb ; adapted by Cryssie A. Hotchkiss ; illustrations by Chris DiNapoli
Macfadden-Bartel c1969 The Ladder series . Ladder edition
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Henry Billings
Macfadden-Bartell c1968 The Ladder series
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D. S. Halacy, Jr. ; adapted by Ralph K. Andrist
Macfadden-Bartell c1966 The Ladder series L-28
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