Abstract Ralph Belknap Baldwin (1912-2010) was a planetary scientist and Grand Rapids industrialist. He is known for his work on lunar craters and also helped developed the radio proximity fuze during World War II. The collection includes photographs, newspaper clippings and papers pertaining to his life, career and family. It includes a reflective and factual autobiography and is particularly rich in its data on Baldwin's work in astrophysics. Also included is information on the genealogy of the...