Available From Select an entry below for more details
Big thanks to Player_7 and the Aqua Teen Central for this one!
Second half is "The Book Song" by Endresen / Anderson from the same album
These tracks are not available to the public for purchase or download, but you can listen to them here:
The Party Polka
The Book Song
Image Source for Pt. 2: NASA 1984, "Backpacking"