v. [1]. North America / Michael K. Schoenecke, volume editor -- v. [2]. Latin America / John F. Bratzel, volume editor -- v. [3]. Europe / Gerd Bayer, volume editor -- v. [4]. North Africa and the Middle East / Lynn Bartholome, volume editor -- v. [5]. Sub-Saharan Africa / Dennis Hickey, volume editor -- v. [6]. Asia and Pacific Oceania / Gary Xu and Vinay Dharwadker, volume editors.