Grand Canyon: Views Beyond the Beauty
by Gary Ladd
ISBN 13: 9780938216896
Format: Paperback (82 pages) Publisher: Grand Canyon Association Published: 15 Sep 2008
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Major John Wesley Powell (Voyage of Discovery)
by
ISBN 13: 9780887140594
Format: Paperback (64 pages) Publisher: KC Publications Published: May 1991
Oregon Trail: Voyage of Discovery (The Story behind the scenery)
by Dan Murphy,Gary Ladd,Mary L Van Camp
ISBN 13: 9780887140648
Format: Paperback (64 pages) Publisher: KC Publications Published: 31 Dec 1992