Retroreflection :  definition and measurement 

 - Paris :  Bureau Central de la CIE,  1982 
 - vi, 28 p. 
 - Publication CIE ;   no. 54 (TC-2.3) .
<br/><br/> At head of title: International Commission on Illumination 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reflectance<br/>Photometry<br/>Colorimetry