"Fluorverbindungen." . . "Fluorine." . . "Fluor." . . . . . . . . . . . . . . "The Manufacture and use of fluorine and its compounds" . . . . "The Manufacture and use of Fluorine and its Compounds" . "The Manufacture and Use of Fluorine and its Compounds. [With plates.]"@en . . . . . . . "The manufacture and use of fluorine and its compounds" . "The manufacture and use of fluorine and its compounds"@en . . . .