Coltman-Rogers, C. (1920). Conifers and their characteristics / by Charles Coltman-Rogers. J. Murray.
Chicago-referens (17:e uppl.)Coltman-Rogers, Charles. Conifers and Their Characteristics / by Charles Coltman-Rogers. London: J. Murray, 1920.
MLA-referens (8:e uppl.)Coltman-Rogers, Charles. Conifers and Their Characteristics / by Charles Coltman-Rogers. J. Murray, 1920.
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