C O M O C O N S E G U IR P U B L IC A C IO N E S D E L A S N A C IO N E S U N ID A S Las publicaciones de las Naciones Unidas están en venta en librerías y casas distribuidoras en todas partes del mundo. Consulte a su librero o diríjase a: Naciones Unidas, Sección de Ventas, Nueva York o Ginebra. Litho in United Nations, New York 02850 11636-May 1990-4,250 ISSN 0257-0653
**Analysis**
The text appears to be a publication announcement by the United Nations, with no specific content or topic mentioned. However, the fact that it is a publication of the UN and has an ISSN number suggests that it may be a report, document, or other type of publication related to international affairs or global issues.

**Category**
International trade, Science and technology