| Sources |
- [S356] The Church of Jesus Christ of Latter-day Saints, FamilySearch (http://new.familysearch.org), ((http://new.familysearch.org)), accessed 7 Aug 2018), entry for Emanuel Ducker, person ID ML15-BCL. (Reliability: 3).
- [S118] England and Wales, Civil Registration Index: 1837-1983, (FreeBMD. England and Wales, Civil Registration Index: 1837-1983. [database online] Provo, UT: Ancestry.com, 2001. Original data: Microfilm and microfiche of the England and Wales, Civil Registration Indexes created by the General Register Office, in London, England.), GRO Reference - District Gainsborough - Volume 7a Page 607 (Reliability: 3).
- [S356] The Church of Jesus Christ of Latter-day Saints, FamilySearch (http://new.familysearch.org), ((http://new.familysearch.org)), accessed 7 Aug 2018), entry for Emanuel Ducker, person ID ML15-BCL. (Reliability: 3).
;Contributor: Les Going, lesgoing@gmail.com
- [S118] England and Wales, Civil Registration Index: 1837-1983, (FreeBMD. England and Wales, Civil Registration Index: 1837-1983. [database online] Provo, UT: Ancestry.com, 2001. Original data: Microfilm and microfiche of the England and Wales, Civil Registration Indexes created by the General Register Office, in London, England.), GRO Reference - District Gainsborough - Volume 7a Page 1425 (Reliability: 3).
- [S356] The Church of Jesus Christ of Latter-day Saints, FamilySearch (http://new.familysearch.org), ((http://new.familysearch.org)), accessed 7 Aug 2018), entry for Mary Matilda Ducker, person ID LXW3-T5Z. (Reliability: 3).
;UK Free BMD Mar 1895 Gainsborough, 7a/909.
Contributor: Les Going, lesgoing@gmail.com
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