ANNALS OP THE NEW YORK ACADEMY 527,203 OF SCIENCES Vol. 262 Seventh Texas Symposium on Relativistic Astrophysics, A conference entitled held on December 16,17,18,19 and 20,1974 in Dallas,Texas,sponsored by The American Astronomical Society The American Physical Society,and The New York Academy of Sciences, Ed. by P.G.Bergmann,E.J.Fenyves and L.Motz. New York 1975 8° s. nlb. 6, 500, il. Annals of The New York Academy of Sciences vol. 262