Cleve, P. T. (Per Teodor), 1840-1905, author.
[Isolation of Helium] / P. T. Cleve.
Collection of two Comptes Rendus issues with one P. T. Cleve's paper and one note on isolation and density of helium.
Helium.
Sur la pršence de l'hľium dans la clv̌ǐte.
Sur la densit ̌de l'hľium.