Ámbito geográfico
UNITED STATES
73
LATIN AMERICA
32
AFRICA
11
GREAT BRITAIN
11
ARGENTINA
9
CHINA
8
MIDDLE EAST
7
ASIA
6
EUROPE, EASTERN
6
CANADA
5
DEVELOPING COUNTRIES
5
EAST ASIA
5
EUROPE
5
GREECE
5
SOUTHERN STATES
5
HONG KONG (CHINA)
4
ÉTATS-UNIS
4
AMERICA
3
AMÉRICA LATINA
3
FRANCE
3
OCEANIA
3
ROME
3
SOVIET UNION
3
VIRGINIA
3
AMÉRIQUE LATINE
2
CARIBBEAN AREA
2
EURASIA
2
IRELAND
2
ISRAEL
2
JAPAN
2
MEXICO
2
NORTH CAROLINA
2
RUSSIA (FEDERATION)
2
SOUTH AMERICA
2
TAIWAN
2
AFRICA, EASTERN
1
AFRICA, NORTH
1
AFRICA, NORTHEAST
1
AFRICA, SOUTHERN
1
AFRICA, SUB-SAHARAN
1
AFRIQUE
1
AFRIQUE ORIENTALE
1
AMÉRIQUE CENTRALE
1
AMÉRIQUE DU NORD
1
ANTILLES ANGLOPHONES
1
ANTILLES BRITANNIQUES
1
ASIE
1
ATHENS (GREECE)
1
BRAZIL
1
BUENOS AIRES
1
más ...