1. Bright-Line Stars among the Taurus Dark Clouds.
2. Hα Emission Stars and Peculiar Objects in the Orion Nebula.
3. G. Haro, Flare Stars. Stars and Stellar Systems, Vol. VII, Nebulae and Interstellar Matter, Ed. B. M. Middlehurst and L. H. Aller, 1968, p. 141.
4. 32, 59, 1969.