300 - Social sciences 333 - Economics of land & energy 380 - Commerce, communications & transportation 600 - Technology 620 - Engineering & allied operations 4 900 - History & geography 4 more ... 363 - Other social problems & services 3 610 - Medicine & health 3 630 - Agriculture & related technologies 3 700 - The arts; fine & decorative arts 3 140 - Specific philosophical schools 2 170 - Ethics 2 320 - Political science 2 340 - Law 2 576 - Genetics & evolution 2 580 - Plants (Botany) 2 720 - Architecture 2 800 - Literature & rhetoric 2 330 - Economics 1 370 - Education 1 400 - Language 1 500 - Natural sciences & mathematics 1 540 - Chemistry & allied sciences 1 650 - Management & auxiliary services 1 657 - Accounting 1 see all ... less ...

English 4

Directory of Open Access Books 5

Gonzalez-Aguilera, Diego 2 Rodríguez-Gonzálvez, Pablo 2 Abelha, Marta 1 Bielińska-Dusza, Edyta 1 Fernandes, Sandra Raquel Gonçalves 1 Ferreira-Oliveira, Ana Teresa 1 more ... Wagner, Wolf-Rüdiger 1 Ziębicki, Bernard 1 see all ... less ...

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