Úvod
Stavba Lobačevského planimetrie, GDML_Books, (1969), p. 3-4 / Harvested from
Access to full text
Full (PDF) 
@inbook{403687,
     title = {\'Uvod},
     booktitle = {Stavba Loba\v cevsk\'eho planimetrie},
     series = {GDML\_Books},
     publisher = {Mlad\'a fronta},
     address = {Praha},
     year = {1969},
     pages = {3-4},
     language = {sk},
     url = {http://dml.mathdoc.fr/item/403687}
}

 (éd.). Úvod, dans Stavba Lobačevského planimetrie, GDML_Books,  (1969), pp. 3-4. http://gdmltest.u-ga.fr/item/403687/