http://www.virtuallystrange.net/ufo/updates/2000/jul/m17-026.shtml
...from Jame Oberg's book 'Red Star in Orbit'. "The one named Valentina Tereshkova is the only one we know about, although the first names of two others, Tanya and Irina, were published many years later. Of the fourth young woman, not even her name is known, although one foreign journalist claimed it was Ludmilla..." (p. 64) "(Her mother learned that Valentina was a cosmonaut when the flight was announced over Radio Moscow.)" (p. 65) "In 1976 at a press conference at the NASA Space Center in Houston, I [James Oberg] asked her [Valentina Tereshkova] who and where the other three woman cosmonaut trainees were; immediately she demanded that I be expelled from the meeting room - and I was.)" (p. 67)