Ronald N. Helms

N. H. · R. H. · R.N. · Ronald N.

titleISBN-13
(ISBN-10)
year of publica-
tion
other author(s)
Illumination Engineering for Energy Efficient Luminous Environments978-0-13-450809-2
(0-13-450809-2)
1980
Lighting for Energy Efficient Luminous Environment978-0-13-451568-7
(0-13-451568-4)
1991M. Clay Belcher

Ronald N. Herter