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How moutains are made

By Zoehfeld, Kathleen Weidner. HarperCollins 1995 . 32 p., col.ill. ; 20 cm. 0-06-445128-3

By Zoehfeld, Kathleen Weidner. HarperCollins 1998 . 32 p., col.ill. ; 20 cm. 0064451631

By Zoehfeld, Kathleen Weidner. HarperCollins 1994 . 32 p., ol.ill. ; 20 cm. 0064451240

By Zoehfeld, Kathleen Weidner. HarperCollins 1981 . 32 p., col.ill. ; 20 cm. 0064451321