The Soviet Union and the Yemens: Influence on Asymmetrical Relationships, by Stephen Page. 230 pages, index, bibliography. Praeger, New York1985. $32.95/$14.95. - Yemen Enters the Modern World: Secret U.S. Documents on the Rise of the Second Power on the Arabian Peninsula, edited by Ibrahim al-Rashid. 228 pages, index, Documentary Publications, Chapel Hill, N.C. 1984. $34.95.