Print ISSN 0036-3634

SUBSCRIPTION INFORMATION

Annual subscriptions of the journal's printed version is available as follow:

• México
  General public: $ 180.00 M.N.
  Students: $ 150.00 M.N.

• Latin America
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• Other countries
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Single issues are also available:

• México
  General public: $ 40.00 M.N.
  Students: $ 40.00 M.N.

• Latin America
  General public: $ 12.00 U.S.D.

• Other countries
  General public: $ 15.00 U.S.D.

Subscription orders should be sent to the Institute at the address below, or by phone (52 73) 29.3055.

The SciELO online version of the journal is based upon the methodology developed by the Fapesp/Bireme Project on Electronic Periodicals. Presently, the online version, that includes the complete texts of the articles, is available free of charge. Further information, please see copyright.