1. Differences in Intcrnode Length between, and the Effect of Variations in Light Duration upon, Seedlings of Annual and Biennial White Clover;Pieters;Jour. Agr. Res.,1925
2. Über das Treiben der cinheimischen Baüme, speziell der Buche;Klebs;Abhand. d. Heidelberger Akad,1914
3. Localisation of the Response in Plants to Relative Length of Day and Night;Garner;Jour. Agr. Res.,1925
4. Recherches sur les Pigments des Plastes et sur la Photosynthèse: la Biologie de la Photosynthèse;Lubimenko;Rev. Gen. de Bol.,1928
5. A Study of Physiological Balance in Nutrient Media;Shive;Phys. Res.,1916