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1مورد إلكتروني
المؤلفون: Stevens, William H. http://id.loc.gov/authorities/names/n99025896 http://viaf.org/viaf/sourceID/LC|n99025896; Hill, Samuel W.; Williams, C. P.; Barnes, Rufus L. http://id.loc.gov/authorities/names/nr2001023442 http://viaf.org/viaf/sourceID/LC|nr2001023442
المصدر: a W0883915 W0874044 N0473015 N0470627; Scale indeterminate, (W 88°39'15"-- W 87°40'44"/N 47°30'15"-N- 47°06'27").
مصطلحات الفهرس: Geology Michigan Maps. http://id.loc.gov/authorities/subjects/sh85054037; Maps shelf.; Geology Maps.; Keweenaw Peninsula (Mich.) Maps. http://id.loc.gov/authorities/subjects/sh85072110; Michigan Maps.; Michigan Keweenaw Peninsula Maps., image