Tom Lehrer has released all this songs into the public domain.
I've been a fan for for so long I can't remember, but 40years+ would be a good bet, "Poisoning Pigeons in the Park" still cracks me up.
They're free to download from his website…https://tomlehrersongs.com
Be warned his site will close in the not too distant future.
Tom Lehrer
Tom Lehrer
NigeAmp, NigeSD DAC, Airtight ATM-4, Ruark Accolades, Pink Triangle TT, Roksan Artimiz, Clearaudio Discovery, Tom Evans Microgroove Plus, Fran DAC, Dalkey Audio Interconnects.