Kittiyut Punchay และ Thaweesakdi Boonkerd. (2014) DIVERSITY OF PTERIDOPHYTES IN PHU THAB BOEK AREA, PHU HIN RONG KLA NATIONAL PARK, PHETCHABUN PROVINCE. Chulalongkorn University:ม.ป.ท.Kittiyut Punchay และ Thaweesakdi Boonkerd. 2014. DIVERSITY OF PTERIDOPHYTES IN PHU THAB BOEK AREA, PHU HIN RONG KLA NATIONAL PARK, PHETCHABUN PROVINCE. ม.ป.ท.:Chulalongkorn University;Kittiyut Punchay และ Thaweesakdi Boonkerd. DIVERSITY OF PTERIDOPHYTES IN PHU THAB BOEK AREA, PHU HIN RONG KLA NATIONAL PARK, PHETCHABUN PROVINCE. ม.ป.ท.:Chulalongkorn University, 2014. Print.