squeak quickreference?

I found a squeak quickreference as pdf on different links in www.

As source is given

This document is in the Squeak Documentation Archive at:
http://docs.squeakspace.com/quickreference

But this link is obviously dead?

Under which license may I use and distribute the document?

I look for the "original" because in none of the different documents
from the different links is given any copyright? So the license of that
document remains a mystery.

is there anyone able to help?

Regards

B. Blochl
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