During lectures [photograph]
Mathematics in the Austrian-Hungarian Empire, GDML_Books, (2010), p. 74 / Harvested from
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@inbook{400819,
     title = {During lectures [photograph]},
     booktitle = {Mathematics in the Austrian-Hungarian Empire},
     series = {GDML\_Books},
     publisher = {Matfyzpress},
     address = {Praha},
     year = {2010},
     pages = {74-74},
     url = {http://dml.mathdoc.fr/item/400819}
}

 (éd.). During lectures [photograph], dans Mathematics in the Austrian-Hungarian Empire, GDML_Books,  (2010), p. 74. http://gdmltest.u-ga.fr/item/400819/