kw.\*:("CIRCUMZENITHAL")
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BEMERKUNGEN ZU EINEM PHOTOELEKTRISCHEN BEOBACHTUNGSVERFAHREN AM ZIRKUMZENITAL. = REMARQUES SUR UNE METHODE D'OBSERVATION PHOTOELECTRIQUE AU CIRCUMZENITHALPOTTHOFF H; STEINERT KG.1976; WISSENSCH. Z. TECH. UNIV. DRESDEN; DTSCH.; DA. 1976; VOL. 25; NO 4; PP. 926-929; BIBL. 11 REF.Article
ON THE SETTING ERRORS OF THE ANGLE STANDARD OF THE CIRCUMZENITHAL INSTRUMENT AND OF THE ASTROLABENIEMI A.1981; ASTRON. ASTROPHYS. (BERL.); ISSN 0004-6361; DEU; DA. 1981; VOL. 104; NO 2; PP. 276-279; BIBL. 3 REF.Article
FREQUENCY ANALYSIS OF THE CIRCUMZENITHAL ARC: EVIDENCE FOR THE OSCILLATION OF ICE-CRYSTAL PLATES IN THE UPPER ATMOSPHEREMCDOWELL RS.1979; J. OPT. SOC. AM. (1930); ISSN 0030-3941; USA; DA. 1979; VOL. 69; NO 8; PP. 1119-1122; BIBL. 23 REF.Article