Apt

Orbit: NASA Astronauts Photograph the Earth (National Geographic)

By Apt, Jay, etc.

Germany's New Security Demographics: Military Recruitment in the Era of Population Aging (Demographic Research Monographs)

By Apt, Wenke

Orbit: Nasa Astronauts Photograph the Earth

By Apt, Jay, Helfert, Michael, Wilkinson, Justin, Ressmeyer, Roger, National Geographic Society (U. S.)