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* NAS National Academy of Sciences. ...their environment to enrich their understanding of ecological sys­tems and natural resources.

...Congress Classification:Class C -- Auxiliary Sciences of History|Auxiliary Sciences of History]] |H||[[Library of Congress Classification:Class H -- Social sciences|Social Sciences]]

* Institute of Education Sciences * Natural Resources Conservation Service

[[en:Natural environment]] [[simple:Natural environment]]

...09-18|accessdate=2007-12-16|journal=Proceedings of the National Academy of Sciences of the USA|pmid=10500106|doi=10.1073/pnas.96.20.10955|volume=96}}}} *<!-- Do --> {{wikicite|id=idDole1965|reference={{citejournal|title=The Natural History of Oxygen|first=Malcolm|last=Dole |url=http://www.jgp.org/cgi/repri

...rst = Cindy | authorlink = | coauthors = | title = Wild Health: Lessons in Natural Wellness from the Animal Kingdom | publisher = Houghton Mifflin Harcourt | ...thor=Wisner A, Dufour E, Messaoudi M, ''et al.'' |title=Human Opiorphin, a natural antinociceptive modulator of opioid-dependent pathways |journal=Proc. Natl.

...في الفكر الاعتقادي (ثيولوجي) الطبيعي يتفق مع روح وتراث كتاب الفكر الطبيعي Natural theology لوليم بالي William Paley ، أو مطولات جسر ال ...لف الكتاب الواسع الانتشار (الصلات ما بين العلوم) The Relations Between The Sciences الذي صدر عام 1968'''.

...in diabetic rats induced by nicotinamide and streptozotocin |journal=Life Sciences |volume=74 |issue=23 |pages=2897–908 |year=2004 |month=April |pmid=150504 * Murray, M. & Pizzorno, J. (1990). Encyclopaedia of Natural Medicine. London: Littlebrown and Company. ISBN 1-85605-498-5{{Verify sourc

...8516 |year=1988 |month= |author=Higgitt, A; Fonagy, P; Lader, M |title=The natural history of tolerance to the benzodiazepines. |volume=13 |issue= |pages=1– ...ne overdose. |volume=42 |issue=1 |pages=155–6 |journal=Journal of forensic sciences}}</ref>