Here are some book and dissertation sources to get you started. This is not an exhaustive list!
Minority languages, the Scandinavian experience: papers read at the conference in Edinburgh 9-11 Nov. 1990
Blom, Gunilla, 1992.
Invandrare & minoriteter: tidskrift för kultur, politik, forskning och debatt = Scandinavian migration and ethnic minority review.
[Periodical]
My European family: the first 54,000 years
Bojs, Karin, 2017.
Śami reindeer herders in Alaska: letters from America: originally published in Nuorttanaste 1901-1937
Kárášjohka : ČálliidLágádus, 2014.
By the fire: Sami folktales and legends
Hatt, Emilie Demant, 2019.
Cultural confrontation on two fronts: Swedes meet Lenapes and Saamis in the seventeenth century
Fur, Gunlog Maria, 1993.
Finnarnas historia i sverige (Finnish history in Sweden)
Tarkiainen, Kari, 1993.
Finnarne i mellersta sverige. (The Finns in central Sweden)
Nordmann, Petrus, 1888.
Utvandringen fran Finland till Sverige genom tiderna (Emigration from Finland to Sweden across the ages)
Koivukangas, Olavi, 1980.
Finding our fathers: a guidebook to Jewish genealogy
Rottenberg, Dan, 1977.
Svensk judiska pionjarer och stamfader, (Swedish Jewish pioneers and ancestry)
Ivarsson, Martin; Brody, Abraham; 1956.
Judiskt liv i Norden (Jewish life in the North)
Broberg, Gunnar; Runblom, Harald; Tyden, Mattias, ed; 1988.