Charles Bukowski - American author

I wondered if any of you had come across references to Bukowski using notebooks. I know he composed a lot of stuff directly on typewriters (and later on word processor) but did he also use notebooks? Anything in the archives on this?
I mean notebooks as a place for ideas and lines and rough drafts, not a diary.
Apologies if this is a duplicate thread. I did try searching before opening this topic but ended up with a hundred hits on "Wine-Stained Notebook..."
Any thoughts?