00513nam a2200169Ia 4500003000900000008004100009040001600050080001700066100001500083245012600098260003000224300001000254650004100264650001600305650001100321650001100332IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a535.821bTWY  aTwyman, F. 0aPrism and lens makingba textbook for optical glass workerscF. Twyman                                                     aLondonbAdam Hilgerc1942  a178p.  aAstronomy and astrophysics thesaurus  aLens design  aLenses  aPrisms