| #5271 | National institute economic review. -- London : National Institute of Economic and Social Research, 1959-. -- ISSN 0027-9501 print. -- ISSN 1741-3036 online |
| #5272 | National petroleum news. -- Cleveland : National Petroleum Pub. Co., 1909-. -- ISSN 0149-5267 |
| #5273 | National Telephone Journal. -- London : A. Anns, 1906-1912 |
| #5274 | Natural resources forum. -- Oxford : Blackwell Publishers Limited, 1976-. -- ISSN 0165-0203 print. -- ISSN 1477-8947 online |
| #5275 | Natural Rubber News. -- Washington : Malaysian Rubber Research and Development Board, 1950-1988. -- ISSN 0028-0755 |
| #5276 | Natural rubber technical information sheet. -- United Kingdom : Brickendonbury : Malaysian Rubber Producers´ Research Association, 1964-. -- ISSN 0307-8183 |
| #5277 | Natural stone specialist. -- Worthing : Herald House, 1994-. -- ISSN 1356-5443 |
| #5278 | Nature. -- London : Nature Publishing Group, 1869-. -- ISSN 0028-0836 print. -- ISSN 1476-4687 online |
| #5279 | Nature and resources. -- Paris : Unesco, 1965-. -- ISSN 0028-0844 |
| #5280 | Nature biotechnology. -- New York : Nature, 1996-. -- ISSN 1087-0156 print. -- ISSN 1546-1696 online |