Proiskhozhdenie i khimicheska︠i︡a ėvol︠i︡u︠t︡si︠i︡a Zemli - Voĭtkevich, G. V. (Georgiĭ Vitolʹdovich) (Seri︠i︡a "Nasto︠i︡ashchee i budushchee Zemli i chelovechestva", 1973)