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*1102 $aBritish Standards Institution$0(NO-TrBIB)90085280$_15030300
*24510$aBritish standard specification for plano-convex (bullseye) lenses$cBritish Standards Institution
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*300  $a5 s.
*500  $a"No. 624-1935"
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*999  $aoai:nb.bibsys.no:999326648654702202$b2021-11-14T20:50:55Z$z999326648654702202
^