Goddard Memorial Symposium.Goddard Memorial Symposium (23rd : 1985 : Maryland )：Europe/United States space activities : 19th European Space Symposium ．V.61，supplement to Advances in the Astronautical Science.Pub. for the AAS by Univelt, Incorporated,1985.
Goddard Memorial Symposium (23rd : 1985 : Maryland )：Europe/United States space activities : 19th European Space Symposium ．V.61，supplement to Advances in the Astronautical Science
Goddard Memorial Symposium.Pub. for the AAS by Univelt, Incorporated,1985.
