2
Published 2017
Deutsches Institut für Normung e.V.

3
Published 2017
Deutsches Institut für Normung e.V.

4
Published 2009
International Organization for Standardization

5
Published 2008
ISO Copyright Office

8
Published 2006
Deutsches Institut für Normung e.V.

9
Published 1966
Deutsches Institut für Normung e.V.

10
Published 2009
Deutsches Institut für Normung e.V.

11
Published 2006
Deutsches Institut für Normung e.V.

12
Published 2014
International Organization for Standardization

13
Published 2014
International Organization for Standardization

14
Published 2015
International Organization for Standardization

15
Published 2015
International Organization for Standardization

16
Published 2017
Deutsches Institut für Normung e.V.

17
Published 2004
ISO Copyright Office

18
Published 2009
ISO Copyright Office

19
Published 2011
ISO Copyright Office

20
Published 2009
ISO Copyright Office