Let Mac Hut be your friend:

Think Reference 2.0:

http://www.valleyofthelights.com/jcoventry/machut/files/programming/symantec/THINK%20Reference%202.0.sit

Various versions of Think Pascal:

http://www.valleyofthelights.com/jcoventry/machut/files/programming/symantec/THINK%20Pascal/