. . . . . "The Examination of Hydrocarbon Oils and of Saponifiable Fats and Waxes ... Authorized translation from the fourth German edition, by E. Mueller"@en . "The examination of hydrocarbon oils and of saponifiable fats and waxes" . "The examination of hydrocarbon oils and of saponifiable fats and waxes"@en . . . . . . . . . . . . . . . . . .