Berlin, Akademie der Wissenschaften, 1930. 4to. Orig. printed green wrapper. No VI, 1930 of Sitzungsberichte der Preussische Akademie der Wissenschaften. Wrappers with very small nicks atspine. Small part of one corner gone. pp. 110-120. A small stamp at foot of frontwrapper.
Reference : 38646
First edition in the periodical form. - Weil No. 170
Herman H. J. Lynge & Son
William Schneider
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Berlin, Gruyter & Co., 1930. 4to. Orig. printed orange wrappers. Offprint/Sonderausgabe aus Sitzungsberichten...pp. (1)-13. Fine fresh copy.
First edition in the rare Offprint with its separate printed title and separate pagination. Se Weil No. 170, not mentioning this.The early Offprints from ""Sitzungsberichten..."" are called ""Sonderabdruck"" up to Weil No.165 (including this). From Weil 166 they are called ""Sonderausgabe..."". - Before 161 (up to 160) the Offprints do not have separate title and pagination (the pagination follows the numbering in the periodical). From 166 the Offprint has both separate printed title and pagination. - ( So Weil Nos 161-165 is still ""Abdruck"", but with separate title and pagination). These facts are not mentioned in the bibliographies.