Gerrienne P. Abiostratigraphic method based on a quantification of fossil tracheophyte characters - its application to the Lower Devonian Posongchong flora (Yunnan Province, China). JPS [Internet]. 1996 Dec. 31 [cited 2024 May 1];45:194-200. Available from: https://www.jpsonline.co.in/index.php/jop/article/view/1233