List of Articles logical form Open Access Article Abstract Page Full-Text 1 - On Carnap's Endeavor for By-Passing the Barriers of Meaningful Speech مجید داودی بنی Open Access Article Abstract Page Full-Text 2 - Assessment of the Effects of Geological Formation on the Water Resources Quality in Arid and Semiarid Watersheds Naser Shamskia H. R. Payrovan Open Access Article Abstract Page Full-Text 3 - Relationship between Geological Formations and Contour Form of Topographic Maps in Part of Northern and Southern Alborz عیسی Jokar Sarhangi Mansour Bakhshi Open Access Article Abstract Page Full-Text 4 - Intrudoction to the flora,life form and plant geogerafical distribiuotion of haraun Region,in kerman province ,iran S.M.A Vakili Shahrbabak Open Access Article Abstract Page Full-Text 5 - Legume-Grass Ratio and some Soil Properties in Four Vegetation Types in Steppe Rangelands of Iran (Case study: Peshert Rangelands in Chahardangeh Sari, Iran) Nahid Jabbari Ghasem Ali Dianati Tilaki Hassan Ghelichnia Open Access Article Abstract Page Full-Text 6 - Impact of Abiotic Environmental Factors on Pistacia vera L. Density in Woody Rangelands: A Case Study in Northeastern Iran Alemeh Mazangi Hamid Ejtehadi Mohammad Farzam Omid Mirshamsi Soroor Rahmanian