by Ivan, Siman
Published in Education and Science Without Borders (01.01.2010)

by BARTAK, VLADIMIR, SIMAN, IVAN, HOLECEK, STANISLAV, DVORAK, JAROSLAV, PARDUBICE
Year of Publication 22.05.1980

by SIMAN,IVAN, BARTAK,VLADIMIR, DVORAK,JAROSLAV, HOLECEK,STANISLAV
Year of Publication 16.01.1975