کتاب های Sellers Robert
![Understanding Space : An Introduction to Astronautics 2nd Ed.](http://cdn.ketabkoo.com/covers/0/95313-n.jpg)
Understanding Space : An Introduction to Astronautics 2nd Ed.
Jerry Jon Sellers, William J. Astore, Robert B. Giffen, Wiley J Larson, Jerry Sellers, William Astore, Robert Giffen, Wiley Larson, 2003![理解航天:航天学入门](http://cdn.ketabkoo.com/covers/10/1092376-n.jpg)
理解航天:航天学入门
Jerry Jon Sellers, William J. Astore, Robert B. Giffen, Wiley J. Larson, 2007![Epidemiology for public health practice](http://cdn.ketabkoo.com/covers/12/1208516-n.jpg)
Epidemiology for public health practice
Friis, Robert H.; Sellers, Thomas A., 2014![The Battle for Bond](http://cdn.ketabkoo.com/covers/14/1476403-n.jpg)