List of Articles chainsaw Open Access Article Abstract Page Full-Text 1 - Evaluating Efficiency of Forest-Trees Felling Motor-Manual Groups Using Data Envelopment Analysis Method in West of Mazandaran Province Morteza Madanipour Kermanshahi Leila Karamali Open Access Article Abstract Page Full-Text 2 - Investigation of pollution output in felling by chainsaw Majid Lotfalian Naghimeh Badraghi Hamed Naghavi Open Access Article Abstract Page Full-Text 3 - Selection of suitable extraction method for Mahallat travertine mines using Analytical Hierarchy Process (AHP) Saeed Dehghan Ghasem Sattari Hamed Boustanzar Mohammad- Ali Aliabadi