Caldwell, O. W. (1902). A laboratory manual of botany: Outlines and directions for laboratory and field-work in botany in secondary schools. D. Appleton and Co..
Citace podle Chicago (17th ed.)Caldwell, Otis W. A Laboratory Manual of Botany: Outlines and Directions for Laboratory and Field-work in Botany in Secondary Schools. New York: D. Appleton and Co., 1902.
Citace podle MLA (8th ed.)Caldwell, Otis W. A Laboratory Manual of Botany: Outlines and Directions for Laboratory and Field-work in Botany in Secondary Schools. D. Appleton and Co., 1902.
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