Endophyte-Promoted Phosphorus Solubilization in Populus oleh Tamas Varga, Kim K. Hixson, Amir H. Ahkami, Andrew W. Sher, Morgan E. Barnes, Rosalie K. Chu, Anil K. Battu, Carrie D. Nicora, Tanya E. Winkler, Loren R. Reno, Sirine C. Fakra, Olga Antipova, Dilworth Y. Parkinson, Jackson R. Hall, Sharon L. Doty