| #261 | Mitteilungen - Vereinigung Industrielle Kraftwirtschaft e. V. -- Essen : Vereinigung Industrielle Kraftwirtschaft, 1952-1959. -- ISSN 0462-9361 |
| #262 | Monthly energy review. -- Washington : Energy Information Administration, 1974-. -- ISSN 0095-7356 |
| #263 | Nagra bulletin. -- Wettingen : Swiss National Cooperative for the Disposal of Radioactive W, 1989-. -- ISSN 1420-7532 |
| #264 | National petroleum news. -- Cleveland : National Petroleum Pub. Co., 1909-. -- ISSN 0149-5267 |
| #265 | Natural gas & electricity. -- Hoboken : Wiley, 2003-. -- ISSN 1545-7893 print. -- ISSN 1545-7907 online |
| #266 | Natural gas week. -- Washington : The Oil Daily, 1985-. -- ISSN 8756-3037 |
| #267 | Natural resources forum. -- Oxford : Blackwell Publishers Limited, 1976-. -- ISSN 0165-0203 print. -- ISSN 1477-8947 online |
| #268 | NEFTE compass. -- London : Nefte Compass, 1992-. -- ISSN 0968-6452 print. -- ISSN 1742-4372 online |
| #269 | New energy : magazín strategie, trendů a politiky. -- Praha : Enex Group, 2006-. -- ISSN 1802-1603 |
| #270 | News from DBDH. -- Taastrup : Danish Board of District Heating, 1988-2007. -- ISSN 0904-9681 |