Kemperman, Jerry A.; Barnes, Burton V. (1976-11-15). "Clone size in American aspens". Canadian Journal of Botany. 54 (22): 2603—2607. doi:10.1139/b76-280. ISSN0008-4026. S2CID85891968.
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Kemperman, Jerry A.; Barnes, Burton V. (1976-11-15). "Clone size in American aspens". Canadian Journal of Botany. 54 (22): 2603—2607. doi:10.1139/b76-280. ISSN0008-4026. S2CID85891968.
Kemperman, Jerry A.; Barnes, Burton V. (1976-11-15). "Clone size in American aspens". Canadian Journal of Botany. 54 (22): 2603—2607. doi:10.1139/b76-280. ISSN0008-4026. S2CID85891968.