Lippincott Williams & Wilkins <http://www.lww.com/>

Mary Ann Liebert, Inc. <http://www.liebertpub.com/>

McGraw-Hill Companies <http://www.mcgraw-hill.com/> ; <http://catalogs.mhhe.com/>

Metapress <http://www.metapress.com/>

Minerva Medica <http://www.minervamedica.it>

Mulino (il)  <http://www.mulino.it>

Mycological Society of America <http://www.msafungi.org>

National Academies <http://www.nationalacademies.org>

National Academy of Sciences  <http://www.nasonline.org/>

National Agricultural Library <http://agricola.nal.usda.gov/>

National Center for Biotechnology Information <http://www.ncbi.nlm.nih.gov/>

Nature Publishing Group  <http://www.nature.com/>

New Century Health publishers< http://www.newcenturyhealthpublishers.com/>

New York Botanical Garden Press <http://www.nybgpress.org/>

Nonprofit Journals Group Ag. Food & Bio Sciences <http://www.nonprofitjournals.org/>

NRC (National Research Council of Canada) Research Press  <http://www.nrcresearchpress.com/>

NTIS (National Technical Information Services) <http://www.ntis.gov>

ultimo aggiornamento: 12/04/2011