From the author preface from 1936
Čech, Eduard
Point Sets, GDML_Books, (1969), p. [7]-8 / Harvested from
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@inbook{402646,
     title = {From the author preface from 1936},
     booktitle = {Point Sets},
     series = {GDML\_Books},
     publisher = {Academia Publishing House of the Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1969},
     pages = {[7]-8},
     url = {http://dml.mathdoc.fr/item/402646}
}

Čech, Eduard. From the author preface from 1936, dans Point Sets, GDML_Books,  (1969), pp. [7]-8. http://gdmltest.u-ga.fr/item/402646/