How Much for Just the Planet?

[stoutfellow]

I'm currently reading John Ford's classic Star Trek pastiche How Much for Just the Planet?. (Well, technically it's a re-read, but I find that I don't remember anything more than a handful of bits and snatches.) In it, a large number of characters abruptly break off mid-scene to sing, and they are obviously using notable show tunes, TV themes, and what have you. I am embarrassed by how few of them I recognize. ("Rawhide", and... that's about it.) Does anybody know if there's a list somewhere online? Failing that, can anyone identify a few of them for me?