Karl W. Gullers (? - 1998) was among the earliest members of the ASMP. Although a frequent visitor to the U.S., he was a citizen of Sweden, and there he served for ten years as president of the Nordic Photographers Association. He was also a founding member of Europhot, an international organization for professional photographers in 16 European countries.
Primarily known as a photographer, Gullers was also an author. His many books — there are well over 90 of them — have been translated into eleven languages.
Source: https://asmp.org/tutorials/karl-gullers.html#.VYF6GRNVhBc