John Henry Mackay, the unique - Solneman, K. H. Z., 1905-1991 (Freiburg : Mackay-Gesellschaft, 1978)
Translated from the German; originally published: Freiburg, Mackay-Gesellschaft, [1975].
Keywords: Mackay, John Henry, -- 1864-1933.; Authors, German -- 19th century -- Biography