Kirkwood gap (Simple English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Kirkwood gap" in Simple English language version.

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archive.org

Coleman, Helen Turnbull Waite (1956). Banners in the Wilderness: The Early Years of Washington and Jefferson College. University of Pittsburgh Press. p. 158. OCLC 2191890.

worldcat.org

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Coleman, Helen Turnbull Waite (1956). Banners in the Wilderness: The Early Years of Washington and Jefferson College. University of Pittsburgh Press. p. 158. OCLC 2191890.