Unlike much of the Czechoslovak team, Marianna Krajčírová was Slovak — not Czech. She was part of the 1964 Czechoslovak team in Tokyo, as well as the 1966 World Championships team that won gold. On a personal level, 1967 was her break-out year. At the 1967 European Championships, she finished third in the all-around and third on bars. Then, at the 1967 “Little Olympics” in Mexico City (essentially an Olympics Test Event), she finished second behind Soviet gymnast Natalia Kuchinskaya.
Here’s a 1967 profile from Stadión on Krajčírová, whose father built her a balance beam to train on at home. Plus, there’s a translation of a short interview with Krajčírová (Némethová at the time) from 1970.