

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=...
http://www.globalphilateliclibrary.org/gplstatic/BL_CrawfordDocs/01...
https://books.google.de/books?id=IDp8CgAAQBAJ&pg=PT86&dq=isakovics+...
http://carmenrue.com/files/monticello/history/dehoyos.htm
http://pubs.acs.org/doi/abs/10.1021/ie50091a041
https://www.myheritage.de/research/collection-90100/zusammenstellun... page 685
1870 |
July 21, 1870
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Praha
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1906 |
October 6, 1906
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1917 |
June 5, 1917
Age 46
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Monticello, Sullivan County, NY, United States
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???? |
Vídeňská univerzita, Vídeň
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