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Descriptions of Three New Birds from the Belgian Congo Bulletin of the AMNH , Vol. XXXIV, Art. XVI, pp. 509-513, Oct. 20th, 1915
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Classification. : Class P, subclass PT, part 2: Dutch and Scandinavian literatures.
Classification. Class P, subclass PT, part 2: Dutch and Scandinavian literatures (with supplementary pages)
Classification of the Netherlands Agency for Research Information
NBOI-classificatie van de Gemeenschappelijke Databank voor Lopend Onderzoek in Nederland. Ontworpen door het Nederlands Bureau voor Onderzoek Informatie (NBOI). ; Classification of...
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Key to the classifications of the patent specifications of France, Germany, Austria, Netherlands, Norway, Denmark, Sweden, and Switzerland, in the library of the Patent office.
Epífitas del fragmento de manglar de la UMA Nohan, Carmen, Campeche, México
Methodology of the biological risk classification of animal pathogens in Belgium
ESTRUCTURA Y COMPOSICIÓN FLORÍSTICA DE LAS SABANAS DE LA REGIÓN DE NIZANDA, ISTMO DE TEHUANTEPEC (OAXACA), MÉXICO