Media type: E-Article Title: Invar Contributor: GUILLAUME, CH. -ED. Published: Springer Science and Business Media LLC, 1933 Published in: Nature, 131 (1933) 3314, Seite 658-658 Language: English DOI: 10.1038/131658c0 ISSN: 1476-4687; 0028-0836 Origination: Footnote: