Severe limitations had to be overcome in the development of specialized human resources because of the limited access to scientific and technical information, up-to-date bibliographies and paucity of opportunity for exchange of experiences with top-level institutions in the United States.
古巴在培养专门人才时不得不克服一些严格的限制，因为获取科学技术信息和最新参考书目受限，与美国高级别机构交流经验的机会又很少。