170 - Ethics 333 - Economics of land & energy 600 - Technology 610 - Medicine & health 620 - Engineering & allied operations 4 900 - History & geography more ... 363 - Other social problems & services 3 700 - The arts; fine & decorative arts 3 720 - Architecture 3 000 - Computer science, information & general works 2 140 - Specific philosophical schools 2 300 - Social sciences 2 330 - Economics 2 340 - Law 2 380 - Commerce, communications & transportation 2 576 - Genetics & evolution 2 580 - Plants (Botany) 2 630 - Agriculture & related technologies 2 800 - Literature & rhetoric 2 320 - Political science 1 370 - Education 1 530 - Physics 1 551 - Geology, hydrology & meteorology 1 581 - Specific topics in natural history 1 see all ... less ...

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Directory of Open Access Books 4

Gonzalez-Aguilera, Diego 2 Rodríguez-Gonzálvez, Pablo 2 Altan, Haşim 1 Formoso, Carlos Torres 1 Frattari, Antonio 1 Gibert, Karina 1 more ... Noguchi, Masa 1 Valls, Aida 1 see all ... less ...

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