The missile plains, 2003: t.p. (Jeffrey A. Engel)

Cold war at 30,000 feet, 2007: CIP t.p. (Jeffrey A. Engel) data sheet (b. Nov. 1, 1972)

SMU website, viewed April 22, 2019 (Jeffrey A. Engel is founding director of the Center for Presidential History at Southern Methodist University. He taught American history, international relations, and grand strategy at the University of Wisconsin, Yale University, the University of Pennsylvania, Haverford College, and Texas A&M University's Bush School of Government & Public Service. Engel has authored or edited twelve books on American foreign policy. Email: jaengel@smu.edu) https://www.smu.edu/News/Experts/Jeffrey-Engel