His essay, "A Case Study in Challenge and Response: Danish Rocketry in the 19th Century," was published in the 1966 July issue of the
Aerospace Historian, the quarterly of the Air Force Historical Foundation. He won a second Goddard essay award later, in 1970. After separating from the service, he continued his formal education at the
University of Maryland, earning a BA in history,
cum laude. Winter joined the
National Air and Space Museum (NASM) in 1968 as a temporary part-time employee. In 1970 he became a full-time employee as a historical research clerk. From 1971 he has presented scholarly papers on the
history of rocketry at
International Astronautical Federation congresses, at International Congresses of the History of Science, and at other similar gatherings. In 2002, he and Kerrie Dougherty, then the
Powerhouse Museum curator of space technology in Sydney, Australia, jointly won the "International Partnership Among Museums scholarship" of the
American Association of Museums. Thus, he sojourned in Australia in 2003, with related journeys to
Thailand and
Laos, conducting research toward the planned Powerhouse exhibit,
Fire Dragons: 1,000 Years of Rocketry in Asia. ==Selected bibliography==