Covers history of the United States and Canada from prehistory to the present.
Covers history of the United States and Canada from prehistory to the present.
另与《世界历史研究资料库》互补，后者涵盖内容包括美加以外的世界历史。
Covers history of the United States and Canada from prehistory to the present.
另与《世界历史研究资料库》互补，后者涵盖内容包括美加以外的世界历史。