author = { Schipanski, Meagan E. AND Drinkwater, Laurie E. },

title = { Nitrogen fixation in annual and perennial legume-grass mixtures across a fertility gradient },

publisher = {Springer},

isbn = {0032-079X},

isbn = {1573-5036},

year = {2012},

url = { http://slubdd.de/katalog?TN_libero_mab2 }