List of Articles Principal Components Analysis Open Access Article Abstract Page Full-Text 1 - The study of Environmental Factors in Pteridium Aquilinum (L.) Kuhn Dispersion Nazanin Yadollahi Nematollah Khorasani Asadollah Mataji Vahid Etemad Elmira Kazemi Jahandizi Open Access Article Abstract Page Full-Text 2 - Assessment of variability of essential oil components in different accessions of Damask rose (Rosa damascena Mill.) by multivariate analysis Borzou Yousefi Khosrow Shahbazi Hassan Khamisabady Mohamad Gheitury 10.30495/tpr.2021.1940496.1222