1. Growth of chicks as affected by sunlight through window glass, through a glass substitute, and direct sunlight;Bethke;Ohio Sta. Bimo. Bul.,1926
2. The growth of chicks as affected by sunlight through glass substitutes;Bethke;Poul. Sci.,1927
3. Annual variation in the antirachitic radiation from sun and sky in Baltimore;Clark;Am. Jour. Hyg.,1930
4. Measurement of extreme ultra-violet solar radiation by a filter method;Coblentz;Bu. of Stand. Jour. Res.,1931
5. Value of some of the glass substitutes in growing chicks;Cochran;Iowa Agr. Exp. Sta. Bul.,1928