On two roof pendants in the Wiborg rapakivi massif, southeastern Finland / by Vorma, Atso Ilmari, 1933-

On the petrochemistry of rapakivi granites with special reference to the Laitila massif, southwestern Finland / by Vorma, Atso Ilmari, 1933-

Alkali feldspars of the Wiborg rapakivi massif in southeastern Finland / by Vorma, Atso Ilmari, 1933-

The crystal structure of stokesite, CaSnSi₃O₉.2H₂O / by Vorma, Atso Ilmari, 1933-

A contribution to the mineralogy of ironmagnesium silicates, especially pyroxenes, contained in certain noritic rocks in central Finland / by Vorma, Atso Ilmari, 1933-

On the contact aureole of the Wiborg rapakivi granite massif in southeastern Finland / by Vorma, Atso Ilmari, 1933-

Amphibole and biotite from Rapakivi / by Simonen, Ahti Jouko Päiviö, 1916-

Other Authors: “…Vorma, Atso Ilmari, 1933-…”