A preliminary search for short-period H(α) activity from the planet Jupiter, during the apparition of 1960, etc. ([Extract from] Mémoires Soc. R. Sc. Liège, cinquième série, tome VII, fasc. unique.).
Jelley, John Valentine.
Petford, Alfred David.
[S.l.,
1961]
Joint authors: John Valentine Jelley and Alfred David Petford.