Kaplan, D.R. 1977: Morphological status of the shoot systems of Psilotaceae. Brittonia 29: 30–53.
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Kaplan, D.R. 1977: Morphological status of the shoot systems of Psilotaceae. Brittonia 29: 30–53. |
Kaplan, D.R. 1977: Morphological status of the shoot systems of Psilotaceae. Brittonia 29: 30–53. |