1. Head of Isis Surrounded by Rays of Light Collection: Cornell Gem Impressions Collection Date: 19th century Format: Image
2. The physiological effects of radiant energy Creator: Laurens, Henry, 1885- Collection: Core Historical Literature of Agriculture Publisher: The Chemical Catalog Company, Inc., Publication Place: New York : Date: 1933 Format: Book
3. Photodynamic action and diseases caused by light Creator: Blum, Harold F. 1899- Collection: Core Historical Literature of Agriculture Publisher: Reinhold Publishing Corporation, Publication Place: New York : Date: 1941 Format: Book