"Chemische binding. Valentie." . . "bindingen (chemie)" . . "An introduction to the electronic theory of valency" . . "An introduction to the electronic theory of valency"@en . . . . . "Electronic theory of valency" . "Electronic theory of valency"@en . . . "An Introduction to the Electronic Theory of Valency" . . . "An Introduction to the electronic theory of valency" . . . . . . . . . . . . . . . . "An Introduction to the Electronic Theory of Valency. (Third edition.)" . . . . . . "Électrochimie." . . . . "Ligacoes Moleculares." . . "Valence (Chimie théorique)" . . "Valence (chimie théorique)" . "fysicochemie." . .