http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Power and propulsion element (PPE) spacecraft reference trajectory document
1 online resource (vi, 32 pages) : color illustrations.
Melissa L. McGuire, Steven L. McCarty, and Laura M. Burke.
Includes bibliographical references (page 32).