00620nam a2200193Ia 4500003000900000008004100009020001800050040001600068080001500084100001900099245015200118260003500270300001400305650002800319650001900347650002300366650001100389700002600400IN-BaIIA211028s9999    xx            000 0 eng d  a0-12-232650-4  cIIA Library  a535.5bEGA  aEgan, Walter G 0aOptical properties of inhomogeneous materialsbapplications to geology, astronomy, chemistry and engineeringcWalter G Egan and theodore W Hilgeman  aNew YorkbAcademic Pressc1979  axi, 235p.  ainhomogeneous materials  aNASA thesaurus  aOptical properties  aOptics  aHilgeman, Theodore W.