| Bronnen |
- [S324] Burgelijke Stand Gemeente Ulrum, Geboorteregister Gemeente Ulrum (GR), ((www.allegroningers.nl)), http://allegroningers.nl/zoeken-op-naam/deeds/a157b873-b034-b6e9-bbe2-92cc76cda6f6?person=4946de4f-aac9-d8ba-7c8c-7385aa7ac79e. (Betrouwbaarheid: 4).
- [S548] Migration USA - Ellis Island Passenger Records, (Statue of Liberty - Ellis Island Foundation. heritage.statueofliberty.org), (heritage.statueofliberty.org), manifest, \i S.S. Volendam\i0, April 7, 1923, https://heritage.statueofliberty.org/passenger-details/czoxMjoiMTAzNDcyMDcwMjM1Ijs=/czo5OiJwYXNzZW5nZXIiOw== (Betrouwbaarheid: 3).
- [S548] Migration USA - Ellis Island Passenger Records, (Statue of Liberty - Ellis Island Foundation. heritage.statueofliberty.org), (heritage.statueofliberty.org), manifest, \i S.S. Statendam\i0, October 5, 1929, https://heritage.statueofliberty.org/passenger-details/czoxMzoiOTAxMTk4OTYzNjcwMyI7/czo5OiJwYXNzZW5nZXIiOw== (Betrouwbaarheid: 3).
- [S329] Robert P. Swieringa, Boek: Dutch Chicago. A History of the Hollanders in the Windy City, (Grand Rapids, Michigan: Wm. B. Eerdmans Publishing Co, 2002.), 759., ISBN 9780802813114. (Betrouwbaarheid: 4).
- [S487] Illinois. Chicago., Newspaper USA - Chicago Tribune, Illinois, (articles.chicagotribune.com:), Stevenson Swanson, "Lucrative Lure Of Garbage Hauling Has Long Been A Dutch Treat," March 29, 1993, online archives (http://articles.chicagotribune.com/1993-03-29/news/9303290044_1_garbage-dutch-waste-management). (Betrouwbaarheid: 4).
Noting someone else's success was what caused Henry Groen, who had been in the excavating business, to make the switch to garbage in 1947. He realized that his friends were busy year-round, while he was often idle during the winter. He won a contract to pick up garbage at Midway Airport and another to haul manure and other garbage out of the stockyards.
"We had to clean up the holding pens," said Roger Groen Sr., Henry's son and one person who probably does not lament the passing of the stockyards.
...
Today, Groen and his son, Roger Jr., still run Groen Waste Services in the south suburbs, but they no longer own the company. Like many such businesses, they have been bought up by a larger company-in their case, Mid-American Waste Systems of Canal Winchester, Ohio. The Groens remain in charge of the daily operation of the company.
- [S567] Census - United States 1940, (https://www.familysearch.org/search/collection/2000219: National Archives and Records Administration, n.d.), T627, Worth Township, Evergreen Park Village, enumeration district (ED) 16-503, sheet 15A, household 9319 (Betrouwbaarheid: 3).
- [S566] Census - United States 1930, (https://www.familysearch.org/search/collection/1810731: National Archives and Records Administration, n.d.), T626, Worth Township, Evergreen Park Village, enumeration district (ED) 16-2373, sheet 1A, dwelling 9319 (Betrouwbaarheid: 3).
- [S550] Northern District, Illinois, Naturalizations USA - Illinois, Northern District, ((https://www.familysearch.org/search/collection/1838804)), https://www.familysearch.org/ark:/61903/1:1:XKL1-9HS. (Betrouwbaarheid: 3).
- [S256] U.S. Social Security Administration, Death Records USA - United States Social Security Death Index, ( FamilySearch (https://www.familysearch.org/search/collection/1202535 : ongoing)), entry for https://www.familysearch.org/ark:/61903/1:1:JR2S-D4H (Betrouwbaarheid: 3).
- [S336] Burgerlijke Stand Gemeente Leens, Huwelijksregister Gemeente Leens (GR), ((www.allegroningers.nl)), Huwelijksregister 1891, aktenummer 14; http://allegroningers.nl/zoeken-op-naam/deeds/831b1464-d06c-1d45-4f66-634ae705a12d?person=dcc1998a-7abb-e63b-74d4-20dae936d3e9. (Betrouwbaarheid: 4).
- [S508] Cook County Clerk. Cook County Courthouse, Marriage Records USA - Illinois, Cook County Marriages 1871-1968, ((www.familysearch.com)), https://www.familysearch.org/ark:/61903/1:1:Q21J-1VRL. (Betrouwbaarheid: 3).
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