00776naa#a2200205#i#4500001002200000005001700022011001400039100004100053101000800094102000700102200007500109210005100184215001100235608002700246675017800273700003500451700002900486700004100515856001400556EN\INFRA-M\bibl\4590520260105064604.1##a2500-0535##a20220325b2022####ek#y0engy0150####ca0#aENG##aRU1#aIceland spar and birefringent filter (BF) developmenteJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2022##a15 с.##aJournal article2local##aИнструменты, приборы и методы астрономических наблюдений, измерений и анализа. 520aОптика. 535zENG#1aSkomorovskygValery Iosifovich#1aKushtalgGalina Ivanovna#1aTokareva (Lopteva)gLyubov Sergeevna4#azh-szf.ru