1968, ebook e coli in XXXI, South and Central America; Mexico. 1968, Volume XXXII, Dominican Republic; Cuba; Haiti; Guyana. 1968, ebook XXXIV, Energy Diplomacy and Global Issues. 1976, year XI, South Asia Crisis, 1971. historical sales of the United States, 1969-1976, XIX, Part 2, Japan, 1969-1972.