Author not established. Brhane Gherezghier. Date not established. EHREA archive: /library/documents/doc-0535cb83106816f3a697ba42/
[1] Brhane Gherezghier. Original source: http://www.ehrea.org/Be.pdf. Preserved original: /library/originals/b8551ee851ca243ac13fa3816f17e310c216315eede9921bfa19d1774ec243d7.pdf. SHA-256: b8551ee851ca243ac13fa3816f17e310c216315eede9921bfa19d1774ec243d7