1. Variations in the helium component of the solar wind;Ashridge;Trans. Amer. Geophys. Union,1973
2. Helium and hydrogen velocity differences in the solar wind;Asbridge;Trans. Amer. Geophys. Union,1974
3. Abundance differences in solar wind double streams;Asbridge;Solar Phys.,1974
4. Solar wind ion composition;Bame;Phys. Rev. Let.,1968
5. Spacecraft observation of the solar wind composition;Bame,1972