TY  - BOOK
AU  - Astore, William J
AU  - Giffen, Robert B
AU  - Kirkpatrick, Douglas
TI  - Understanding space : an introduction to astronautics
SN  - 9780073407753
SN  - 200731000
U1  - 530.11 SEL 
PY  - 2005///
CY  - New York
PB  - McGraw-Hill Companies
KW  - Astronautics - Textbooks
KW  - Outer space - Exploration - Textbooks
KW  - Space trajectories - Problems, exercises, etc
N1  - Includes bibliographical references and index
ER  -