Author not established. Prof. Araya Debessay. Date not established. EHREA archive: /library/documents/doc-0caaf804de9f867a185f6dcb/
[1] Prof. Araya Debessay. Original source: http://www.ehrea.org/araya.php. Preserved original: /library/originals/3f3fe51d16fedf7e76e799c13e8649d7ce2196b88b6cac662bd36744bb62d329.html. SHA-256: 3f3fe51d16fedf7e76e799c13e8649d7ce2196b88b6cac662bd36744bb62d329