publication by Henri de Saussure and Leo Zehntner

By: Howard, L. O. (Leland Ossian), - Chittenden, F. H. (Frank Hurlbut), - Coquillett, D. W. (Daniel William), - Hunter, W. D. (Walter David), - Marlatt, C. L. - Matsumura, M. - Zehntner, Leo, - United States. Office of Experiment Stations. Editi