Metcalfe, S. L. (1833). A new theory of terrestrial magnetism: (Read before the New-York Lyceum of Natural History.). G.& C.& H. Carvill.
Lua i Stíl Chicago (17ú heag.)Metcalfe, Samuel L. A New Theory of Terrestrial Magnetism: (Read Before the New-York Lyceum of Natural History.). New York: G.& C.& H. Carvill, 1833.
Lua MLA (8ú heag.)Metcalfe, Samuel L. A New Theory of Terrestrial Magnetism: (Read Before the New-York Lyceum of Natural History.). G.& C.& H. Carvill, 1833.
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