Bibliography
Author Mráz Bohumír Co-authors Rytina Václav Issue data Praha : IDEA SERVIS, 1998 File Books Author Mráz Bohumír Co-authors Rytina Václav Issue data Praha : IDEA SERVIS, 2001 File Books Author Mráz Bohumír Co-authors Rytina Václav Issue data Praha : IDEA SERVIS, 2000 File Books