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).