Dear Norbert - I have had a lot of luck finding out of print songbooks using some of the wonderful used-book search services on the Web. I particularly like www.abebooks.com, but here is a list of a whole bunch of them. For most of them you can enter "Guthrie, Woodie" in the author field and see what you get! No obligation to buy, and you can compare prices being asked by all the used book dealers who list with that particular Web search service (careful - it gets expensive when you start ordering books from Australia; unless you live there, of course, and then N. American shipping gets outrageous...I'm speaking from personal experience here).