Looking at Nucl.Phys. B194 (1982) 422 I read "In 1972 there were two neutrinos and they were both massless. Today we have three and perhaps all of them have mass. " Hey, 1981 and neutrinos have mass? I was not even in the university. And in all the textbooks the neutrino was massless. So how is that they (Bardeen et al) at the Fermilab had already decided that at least some of them were massive?