Belgian History and Immigration
The Walloon Immigrants of Northeast Wisconsin https://archive.org/details/the-walloon-immigrants-of-northeast-wisconsin/mode/2upOur Marchant Relatives https://archive.org/details/OurMarchantRelatives/page/n295/mode/2up
The History of the Belgian Settlements https://archive.org/details/TheHistoryOfTheBelgianSettlements/mode/2up
Door County Stories And Stories From the Belgian Settlement https://archive.org/details/DoorCountyStoriesAndStoriesFromTheBelgianSettlement/mode/2up
History of Door County Wisconsin https://archive.org/details/historyofdoorcou00mart/mode/2up
Belgians In America http://freepages.rootsweb.com/~belgintheamcivwar/history/
The Belgian Researchers http://sites.rootsweb.com/~inbr/servicesAmVar.htm
The Belgian Pioneers of Door County http://images.library.wisc.edu/WI/EFacs/USAIN/BelgComm/reference/wi.belgcomm.i0008.pdf
PenBelGen Family Tree - Huge family tree by researcher Ron Flemal (you may need to register for the site, free) https://gw.geneanet.org/penbelgen
Wisconsin Resources
Wisconsin Historical Society https://www.wisconsinhistory.org/Wisconsin Gen Web http://www.wigenweb.org/
Land Searches and Maps
U.S. Dept of the Interior Bureau of Land Management https://glorecords.blm.gov/search/default.aspxOther Blogs
Theys, Bero Families http://freepages.rootsweb.com/~ptheys/genealogy/photoindex.htmlFameree, Fammeree Blog http://fameree.blogspot.com/
Cemeteries
Find A Grave https://www.findagrave.comBillion Graves https://billiongraves.com/
Resources For Preserving Photos and Documents (Disclaimer: I have not used these myself)
Scan Cafe https://www.scancafe.com/Legacy Box https://legacybox.com/