Rabbi Meir said
Biblical Blue
The History
The Hilazon
The Rediscovery
Porphyrology
Tekhelet
The Chemistry of Tekhelet
The Evidence
Amut P'til Tekhelet
About the Organization
P'til Tekhelet can be found at
http://virtual.co.il/orgs/orgs/tekhelet
Or send email to
joel@tekhelet.co.il