It’s evidently out of print. As I recall, it was originally self-published and then, in 1990, published by College Press. It’s no longer in their catalog.
I’ve submitted a request to College Press to either allow me to post an electronic version or else make the book available on Amazon at modest cost.
In the meantime, if anyone has a copy they can spare for a reader in need, I’d be happy to put you in touch.