Free National Academy of Sciences Publications

NAS Resource Guide for International Users:

The National Academies have made a broad array of PDFs free online to users in most developing countries with a view toreducing the barriers that prevent access to information and full participation in timely scientific exchange. Individuals from certain countries receive free access to PDFs based on their computer?s Internet Protocol (IP) address. Visit http://www.nap.edu/info/faq_dc_pdf.html or http://www.pnas.org/misc/faq.shtml for more information.

PNAS Online users from certain countries can obtain faster Internet service. To find out if your country is eligible, please visit http://www.pnas.org/tips/slow.dtl.

ANOTHER SERVICE: Obtaining Visas to Travel to the United States

The International Visitors Office provides information for scientists on how to obtain a United States visa and what to if a visa is delayed or denied. The International Visitors Office collects and analyzes data on visa applications for use in ongoing efforts to increase scientific mobility. Scientists experiencing difficulties in applying for a visa can submit a Visa Questionnaire. The International Visitors Office will review each case and establish contact if it is able to assist.