Ámbito geográfico
UNITED STATES
ESTADOS UNIDOS
788
LATIN AMERICA
176
GREAT BRITAIN
122
ARGENTINA
99
EUROPE
98
SOVIET UNION
59
JAPAN
48
CANADA
36
MEXICO
36
CUBA
32
FRANCE
31
GERMANY
28
CENTRAL AMERICA
27
CHINA
25
AMÉRICA LATINA
24
DEVELOPING COUNTRIES
24
MIDDLE EAST
18
FOREIGN COUNTRIES
17
AMERICA
15
EUROPA
15
CARIBBEAN AREA
13
GRAN BRETAÑA
13
EUROPEAN UNION COUNTRIES
12
SPAIN
12
GRAN BRETAÑA
11
VIETNAM
11
COLOMBIA
9
IRAQ
9
NORTH AMERICA
9
AMÉRICA LATINA
8
ASIA
8
FRANCIA
8
AFRICA
7
EUROPEAN ECONOMIC COMMUNITY COUNTRIES
7
GUATEMALA
7
ISRAEL
7
ITALY
7
SOUTH AMERICA
7
CHILE
6
MÉXICO
6
SOUTHERN STATES
6
VENEZUELA
6
WASHINGTON (D.C.)
6
BRAZIL
5
CALIFORNIA
5
CONNECTICUT
5
FLORIDA
5
INDIA
5
ISLAMIC COUNTRIES
5
más ...