Author not established. Untitled archived PDF [editorial display title]. Date not established. EHREA archive: /library/documents/doc-bf729da5958f99900c073026/
[1] HBG-1b.tif. Original source: http://www.ehrea.org/hb.pdf. Preserved original: /library/originals/0a0ee850e6325257362eeec413f4271121d5e6f30f0fd74683e5f357fc114250.pdf. SHA-256: 0a0ee850e6325257362eeec413f4271121d5e6f30f0fd74683e5f357fc114250