http://digfir-published.macmillanusa.com/astro_tutorial/astro_tutorial_ch10_the_scale_and_motion_of_the_earth_moon_system.html
Chapter
10. The Scale and Motion of the Earth-Moon System
51c4a85a757a2e1b2500001c
http://digfir-published.macmillanusa.com/astro_tutorial/astro_tutorial_ch10_the_scale_and_motion_of_the_earth_moon_system_dlap.xmlDLAP questions51c4a85a757a2e1b2500001c