Search Results       Your search for [author]Gebel, Radames K. H. returned 1 record.           The threshold of visual sensation in comparison with that of photodetectors, its quantum aspects problems of color perception, and related subjects. by Gebel, Radames K. H.; Wright-Patterson Air Force Base, Ohio: Aerospace Research Laboratories, Office of Aerospace Research ; [for sale by the Superintendent of Documents, U. S. Govt. Print. Off., Washington], 1964. Subject: Vision; Photoelectric cells.          Add to Book Cart Relevance: 35.90%