Here are entered works on trade among nations. Works on foreign trade of specific countries, cities, etc. are entered under headings of the type [place]--Commerce, further subdivided by place, if appropriate. If so subdivided, a second heading is assigned with the place names in reverse positions, e.g. 1. Canada--Commerce--United States. 2. United States--Commerce--Canada.
Here are entered works on the attacks by terrorists on the World Trade Center in New York City and the Pentagon outside Washington, D.C., using three hijacked commercial jetliners, and on the crash of a fourth hijacked jetliner in a rural area of Pennsylvania on September 11, 2001.
Here are entered works on the attacks by terrorists on the World Trade Center in New York City and the Pentagon outside Washington, D.C., using three hijacked commercial jetliners, and on the crash of a fourth hijacked jetliner in a rural area of Pennsylvania on September 11, 2001.
