Groningse doopsgezinden » Sources » http://www.dbnl.org/tekst/sten009monu04_01/sten009monu04_01_0033.php; "Lipsker op de Groninger tichelwerken: een geschiedenis van de Groningse steenindustrie met bijzondere nadruk op de Lipper trekarbeiders 1700-1900" van Piet Lourens en Jan Lucassen; http://www.lz.de/home/nachrichten_aus_lippe/blomberg/blomberg/6814574_Loeffel_kuendet_vom_Schicksal_eines_Zieglers.html
Source description
http://www.dbnl.org/tekst/sten009monu04_01/sten009monu04_01_0033.php; "Lipsker op de Groninger tichelwerken: een geschiedenis van de Groningse steenindustrie met bijzondere nadruk op de Lipper trekarbeiders 1700-1900" van Piet Lourens en Jan Lucassen; http://www.lz.de/home/nachrichten_aus_lippe/blomberg/blomberg/6814574_Loeffel_kuendet_vom_Schicksal_eines_Zieglers.html
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