purchase [new math]
As a child of the 50s/60s, I grew up with Tom Lehrer albums (along with Mozart, Bach, The Temptations and Jimi Hendrix).
And like JDavid, I made my way through American college life with the minimal requirements - lots of other interests along the way , only to find myself teaching math 20 years later!
About a year ago, I ran across and article about Tom Lehrer, wherein it noted that the man essentially dis-appeared of his own accord - having made it big and facing a critical request to return to the big time. (He vehemently declines. Worse yet: he wishes that his oeuvres become publicly non-monetary)
Lehrer simply stopped performing. His entire body of work topped out at 37 songs. [source]