SAA, Stadsarchief Amsterdam, NA 126/15v, Nots: J. F. Bruijningh. Contract (Statement, Power of attorney) of Laurens Joost Baeck, Cornelis Martsz, Leenaert de Beer, Jacob Geurtsz Cleijnsorg
SAA, Stadsarchief Amsterdam, NA 126/15v, Nots: J. F. Bruijningh. Contract (Statement, Power of attorney) of Laurens Joost Baeck, Cornelis Martsz, Leenaert de Beer, Jacob Geurtsz Cleijnsorg