1. Structures and Functions of Organelles. 2-7-00. <http://web.mit.edu/esgbio/www/dogma/trl.html>

2. Structures and Functions of Organelles. 2-7-00. <http://web.mit.edu/esgbio/www/dogma/trl.html>

3. School of Natural Sciences. 2-9-00. <http://server.cs.stedwards.edu/contrib/chemistry/CHEM43?Ribosomes?Ribosome.HTML>