Author not established. Professor Tekie Fessehatzion. Date not established. EHREA archive: /library/documents/doc-b3d3c8a15dc903bf5c62fcef/
[1] Professor Tekie Fessehatzion. Original source: http://www.ehrea.org/tf.php. Preserved original: /library/originals/9d70c9a2e7c93ee2b31f9257b2cfbc1e06c25ca7d2676bf786e0057cc4ec76d7.html. SHA-256: 9d70c9a2e7c93ee2b31f9257b2cfbc1e06c25ca7d2676bf786e0057cc4ec76d7