You may also wish to search for items by Hughes, V. and Hughes.
Only one matching reference was found.
Bonczyk, P.A.; Hughes, V.W., Hyperfine structure of the v=O, J=l state in Rb85F, Rb87F, K39F, and K41F by the molecular-beam electric-resonance method, Phys. Rev., 1967, 161, 15. [all data]