Tunnel entrance lighting :  a survey of fundamentals for determining the luminance in the threshold zone / 
International Commission on Illumination 
 - Paris :  International Commission on Illumination,  1984 
 - vii, 72p. :  ill. 
 - Publication /  no.61 .
<br/><br/><br/>Summary etc in English, French, and German 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tunnels--Lighting