Nathaniel John Winch. (2014). Flora of Northumberland and Durham. Pensoft Publishers.
Chicago Style (17. basım) AtıfNathaniel John Winch. Flora of Northumberland and Durham. Pensoft Publishers, 2014.
MLA (9th ed.) AtıfNathaniel John Winch. Flora of Northumberland and Durham. Pensoft Publishers, 2014.
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