%0 Journal Article %A V. E. Plyushchev %T Reversibility of the reaction between beta spodumene and potassium sulphate %J Doklady Akademii Nauk %D 1960 %P 584-586 %V 131 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_131_3_a32/ %G ru %F DAN_1960_131_3_a32