Macro Implementation of SNOBOL4 in C
A port of Macro SNOBOL4 (The original Bell Telephone Labs implementation, written in SIL macros) for machines with 32-bit (or larger) pointers. Supports full SNOBOL4 language plus SPITBOL and other extensions.
SNOBOL Language Web Page
Introduction to SNOBOL Programming Language.
SNOBOL4+ user notes
Information for people having documentation for the Vanilla SNOBOL programming language and wishing to use SNOBOL4+. By Michael Davis.
Vanilla Snobol4 Reference Manual
Listed in outline format and covers running a Snobol4 program, statements, keywords, operators, functions, and system messages.