1. The Fire Signal System for the Lexington School for the Deaf, a private institution in the Borough of Queens.
2. Board of Education of The City of New York Specification No. 707R-1973/74 for Junior High School No. 47 Annex, Borough of Manhattan.
3. Welch, B. L. and Welch, A. S.,Physiological Effects of Noise, Plenum Press, New York, 1970, p. 161.
4. Handbook of the Illumination Engineering Society, 1972, pp. 8–42.