Alfv�en, Hannes, 1908-1995. Worlds-antiworlds; antimatter in cosmology. - San Francisco, W. H. Freeman [1966] - 103 p. illus. 21 cm. LCCN: 66027947 //r83 Subjects--Topical Terms: Cosmogony. LC Class. No.: QB981 / .A5513 Dewey Class. No.: 523.12