Richmond, J. C. <br/><br/>
Standard reference materials  preparation and calibration of strandards of spectral specular reflectance 
by J. C. Richmond and J. J. Hsia 
 - Washington  National Bureau of Standards  1972 
 - ix, 47p. 
<br/><br/><label>Dewey Class. No.: </label>621.372  / N72