Preliminary analysis of high-resolution spectra for UM 673 A & B Smette, A. ; Surdej, J. ; Shaver, P. A. ; Foltz, C. B. ; Chaffee, F. H., Jr. ; Magain, P. Abstract Publication: Gravitational Lensing Pub Date: 1990 DOI: 10.1007/BFb0009245 Bibcode: 1990LNP...360..122S