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© 1983 Optical Society of America
B. J. Howell, "Patent Reviews: 4,331,504; 4,352,562; 4,360,249; 4,360,272; 4,352,563; 4,360,275; 4,360,586; 4,362,365; 4,362,367; 4,362,387; 4,364,122; 4,364,639; 4,364,641; 4,364,642; 4,364,643; 4,364,644; 4,367,009; 4,367,919; 4,367,921; 4,367,927; 4,367,928; 4,368,953; 4,368,954; 4,368,955; 4,368,956; 4,368,957; 4,371,263; 4,373,785," Appl. Opt. 22, 1601-1606 (1983)
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