International mining.

The international year book and statement´s Who´s Who.

Year book : academic year 2012/2013 /

Year book : academic year 2011/2012 /

Year book : academic year 2021/2022.

Year book : academic year 2014/2015 /

Year book : academic year 2016/2017 /

Year book : academic year 2015/2016 /

Year book : academic year 2010/2011 /

Year book : academic year 2008/2009 /

Year book : academic year 2009/2010 /

Year book : academic year 2022/2023.

Year book : academic year 2020/2021 /

Year book : academic year 2019/2020 /

Évkönyv 1972/1973 /

The International Year Book and Statesmen´s Who´s Who 1966.

Nástroje Walter. 03/2015

Walter Benjamin /

Walter Felsenstein /

Walter Gropius /

Walter R. Skinner´s mining international year book. 1972-1973.