Kautšuk
of the raw materials and the manner of mixing and working them; with the
fabrication of vulcanized and hard rubbers, caoutchouc and gutta percha
compositions, waterproof substances, elastic tissues, the utilization of waste, etc"
Raimund Hoffer( ing.k. tõlkinud William T. Brannt) London, 1883
http://www.archive.org/stream/practicaltreatis00hoffrich/practicaltreatis00hoffrich_
djvu.txt
8. http://www.patentstorm.us/patents/5637645/claims.html võrdleb erinevaid
vormivalamissegusid oma komponentidelt.
annaabi.ee 
