@unpublished{icrisat690,
          school = {Kakatiya University},
          author = {V R Reddy},
            year = {1994},
           title = {Effects of soil management on ecosystem-structure of earthworm and soil arthropod populations in semi-arid tropical alfisol agroecosystem},
             url = {http://oar.icrisat.org/690/}
}