1. Recent studies in raindrops ana erosion;tis Laws;Agri. Eng.,1940
2. Measurements of the fall-velocity of water-drops and raindrops;Otis Laws;Trans. Amer. Geophys. Union,1941
3. The relation of raindrop-size to intensity;Otis Laws;Trans. Amer. Geophys. Union,1943
4. Some important farm machinery and soil-conservation relationships;Nichols;Agri. Eng.,1941
5. Studies of raindrop erosion;Ellison;Agri. Eng.,1944