000			00585nam a2200181 u 4500
001			000883573
005			20240715055223.0
008			120412s1980 r 000 0 eng d
020			_a0-13-450809-2
041	0		_aeng
100	1		_aHelms, Ronald N.
245	1	0	_aIllumination Engineering for Energy Efficient Luminous Environments / _cR.N. Helms.
260			_aEnglewood Cliffs, N.J. : _bPrentice-Hall, Inc., _c1980.
300			_a322 p. : _bfig., tables.
504			_aIncludes Bibliographies and Index.
650	1	4	_aIllumination Engineering
999			_c94901 _d94901