Reference:Freitag1975b
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Verbatim text: Freitag, H. 1975. The genus Piptatherum (Gramineae) in southwest Asia. Notes Roy. Bot. Gard. Edinburgh 33:341-408
Author: Freitag, H.
Year: 1975
Title: The genus Piptatherum (Gramineae) in southwest Asia
Journal: Notes Roy. Bot. Gard. Edinburgh
Volume: 33
Pages: 341–408