Science, New Series, Vol. 140, No. 3570 (May 31, 1963), pp. 993-994 (2 pages) Chemical shifts have been measured for liquid XeF$_{2}$, XeF$_{4}$, XeOF$_{4}$, and XeF$_{6}$, and F$^{19}$-Xe$^{129}$ ...