Author not established. Untitled archived document [editorial display title]. Date not established. EHREA archive: /library/documents/doc-3cdc2c3b24ef6c7dc13c7c4e/
[1] sde.htm. Original source: http://www.ehrea.org/sde.htm. Preserved original: /library/originals/eced1f72ba65ef71ebc6f4a22fbcc9ba9d1ad51b334279571f6569bfeca17597.html. SHA-256: eced1f72ba65ef71ebc6f4a22fbcc9ba9d1ad51b334279571f6569bfeca17597