I found this the other day - It is a massive online text book produced by the United Nations Food and Agriculture Organisation. It is a very comprehensive guide to Meat Processing Technology for SMEs and would probably be a a useful handbook for all Sausage Making's meatheads - http://www.fao.org/docrep/010/ai407e/ai407e00.HTM
Here's another - Manual on Simple Methods of Meat Preservation - http://www.fao.org/docrep/003/x6932e/x6932e00.htm
The FAO has loads of other guides way too many to list here, but well worth searching out.
I hope that you find it useful.
Mat