PREFACE 19 a literary.
Sources (see A rkhiv Marksa i Engelsa (Marx and Engels Archive], Vol. XI, Moscow, 1948; Vol, XII, Moscow, 1952, and Vol, XIII, Moscow, 1955).
Sources (see A rkhiv Marksa i Engelsa (Marx and Engels Archive], Vol. XI, Moscow, 1948; Vol, XII, Moscow, 1952, and Vol, XIII, Moscow, 1955).