Strute, K., & Doelken, T. (1982). Who's who in the arts and literature: A biographical Who's who by the international red series containing some 20000 prominent artists and authors from the Federal Republic of Germany, Austria and Switzerland. / edited by Karl Strute and Theodor Doelken. Who's Who.

Strute, Karl, and Theodor Doelken. Who's Who in the Arts and Literature: A Biographical Who's Who by the International Red Series Containing Some 20000 Prominent Artists and Authors from the Federal Republic of Germany, Austria and Switzerland. / Edited by Karl Strute and Theodor Doelken. Zürich: Who's Who, 1982.

Strute, Karl, and Theodor Doelken. Who's Who in the Arts and Literature: A Biographical Who's Who by the International Red Series Containing Some 20000 Prominent Artists and Authors from the Federal Republic of Germany, Austria and Switzerland. / Edited by Karl Strute and Theodor Doelken. Who's Who, 1982.