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DDC: 610 Type: journal [online]
DDC: 300 Type: journal [online]
DDC: 910 Type: journal [online]
DDC: 020 Type: journal [print, online]
DDC: 540 Type: journal [online]
DDC: 530 Type: journal [print, online]
DDC: 670 Type: journal [print, online, data medium]
DDC: 670 Type: journal [print, online]
DDC: 620 Type: web site [online]