Erich Heckel.

APA Citation

Vogt, P. (1965). Erich Heckel. Recklinghausen: Bongers.

MLA Citation

Vogt, Paul, 1926-2017. Erich Heckel. Recklinghausen: Bongers, 1965.

Warning: These citations may not always be complete (especially for serials).