920 resultados para Chicago and North Western Railway Company.
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St. Louis, & San Francisco Railroad Company, Chicago & Eastern Illinois Railroad Company, Evansville & Terre Haute Railroad Company, St. Louis, Kansas City and Colorado Railroad Company, Arkansas Southern Railroad Company, Chicago & Alton Railroad Company.
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Includes bibliography.
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Mode of access: Internet.
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Many chapters, describing the fauna, products, and topography of the country, are omitted. cf. Publisher's pref.
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Vols. for <1884>-1911 include reports of the Belt Railway Company of Chicago, <1884>-1911.
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Mode of access: Internet.
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Includes bibliography.
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Published also without author's name on t.-p. in a limited edition of 125 copies.
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Mode of access: Internet.
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"Extract from Journals of the Legislative assembly of 5th May, 1880."
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Vol. for 1896 reprinted from The School Review, May, 1896.
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Mode of access: Internet.
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Title varies slightly
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Mode of access: Internet.
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The standard model for the migration of the monarch butterfly in western North America has hitherto been movement in the autumn to overwintering sites in coastal California, followed by a return inland by most individuals in the spring. This model is based largely on observational and limited tagging and recovery data. In this paper we test the model by plotting many years of museum and collection records on a monthly basis on a map of the region. Our plots suggest a movement of Oregon, Washington and other north-western populations of summer butterflies to California in the autumn, but movement of more north-easterly populations (e.g. from Idaho and Montana) along two pathways through Nevada, Utah and Arizona to Mexico. The more westerly of these two pathways may follow the Colorado River south as indicated by museum records and seasonal temperature data. The eastern pathway may enter northern Utah along the western scarp of the Wasatch Mountains and run south through Utah and Arizona. Further analysis of distributions suggests that monarch butterflies in the American West occur primarily along rivers, and there are observations indicating that autumn migrants often follow riparian corridors. More data are needed to test our new model; we suggest the nature of the data required. (c) 2005 The Linnean Society of London.