Harold Keller

American, 1928 - 2017
http://haroldkellerartist.net/hk25benz/?page_id=63

Born
Brooklyn, New York, 1928

Education
Brooklyn Technical High School
University of Arkansas, BA (Art and Philosophy), 1949
University of Oklahoma, Graduate Studies in Painting, 1949-1950
New York University, MA, 1961

Residencies
SUNY, Albany, NY, 1966
Yaddo, Saratoga Springs, NY, 1967, 1968

https://www.legacy.com/obituaries/nytimes/obituary.aspx?n=harold-keller&pid=185027208&fhid=13058

KELLER--Harold, artist and teacher. Born in Brooklyn, September 26, 1928; died, Greenwich, NY, March 28, 2017. 
Wikipedia