Runion, Howell I. and Carl C. Riedesel. "Cadmium Sulfide Exposure Meter for Photomicroscopy Quick View." The American Biology Teacher 28/2 (Feb. 1966)93-95.

Runion, Howell I. and Carl C. Riedesel. "Cadmium Sulfide Exposure Meter for Photomicroscopy Quick View." The American Biology Teacher 28/2 (Feb. 1966)93-95.