Numbers, Natural -- Congresses : Building the foundation : whole numbers in the primary grades : the 23rd ICMI Study / Maria G. Bartolini Bussi, Xu Hua Sun, editors
Numbers, Negative -- History : Conflicts between generalization, rigor, and intuition : number concepts underlying the development of analysis in 17th-19th century France and Germany / Gert Schubring
Here are entered works on the totality of the variety of living organisms, the genetic differences among them, and the communities and ecosystems in which they occur
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Numbers of species. : The species-area relationship : theory and application / edited by Thomas J. Matthews, University of Birmingham, Kostas A. Triantis, National and Kapodistrian University of Athens, Robert J. Whittaker, University of Oxford
Numbers, Real -- Data processing : Reliable implementation of real number algorithms : theory and practice : International Seminar, Dagstuhl Castle, Germany, January 8-13, 2006, revised papers / Peter Hertling [and others] (eds.)