"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MWY7-B8P : accessed 18 Sep 2014), Dorathy M Peterson in household of Peter O Peterson, Long Lake, Crow Wing, Minnesota, United States; citing sheet 4B, family 97, NARA microfilm publication T625, FHL microfilm 1820829.
"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X3Z9-8YJ : accessed 17 Sep 2014), Dorothy Petersen in household of Peter O Petersen, Long Lake, Crow Wing, Minnesota, United States; citing enumeration district (ED) 0033, sheet 2B, family 43, NARA microfilm publication T626, roll 1084.
"Minnesota Birth Index, 1935-2002," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VC55-WT2 : 6 May 2014), Dorothy Peterson in entry for Robert Blackwood, 11 Feb 1941; from "Minnesota Birth Index, 1935-2002," database, Ancestry (http://www.ancestry.com : 2004); citing Hennepin, Minnesota, United States, Minnesota Department of Health, Minneapolis.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JKH3-LJZ : 20 May 2014), Dorothy Maybelle Blackwood, 11 Mar 2007; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
"Find A Grave Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVGB-6TMM : 13 December 2015), Dorothy Blackwood, ; Burial, Jennie, Meeker, Minnesota, United States of America, Lake Jennie Covenant Cemetery; citing record ID 132416231, Find a Grave, http://www.findagrave.com.
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DNA Connections
It may be possible to confirm family relationships with Dorothy by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Dorothy: