[Obálka]
Goniometrické funkce, GDML_Books, (1968), p. [i]-[ii] / Harvested from
Access to full text
Full (PDF) 
@inbook{403639,
     title = {[Ob\'alka]},
     booktitle = {Goniometrick\'e funkce},
     series = {GDML\_Books},
     publisher = {Mlad\'a fronta},
     address = {Praha},
     year = {1968},
     pages = {[i]-[ii]},
     url = {http://dml.mathdoc.fr/item/403639}
}

 (éd.). [Obálka], dans Goniometrické funkce, GDML_Books,  (1968), pp. [i]-[ii]. http://gdmltest.u-ga.fr/item/403639/