˜Theœ Iron Gate complex atlas

Bucureşti : Publ. House of the Acad. of the Socialist Republic of Romania, [ca. 1972].
Umfang/Format: 275 pages : 60 maps ; 42 cm.

Speologia / Academia Republicii Socialiste România, Grupul de Cercetări Complexe Portile de Fier

Bucuresti : Ed. Acad. Rep. Soc. România, 1979.
Umfang/Format: 185 pages : illustrations.