Quality assurance -Requirements on bodies for the determination of air pollutants at stationary sources and in ambient air - Requirements on measurement reports
Edition 2018-11

Lean production systems - Lean leadership
Edition 2017-01

Software reliability
Edition 2021-02

Quality assurance - Requirements on test laboratories and inspection bodies (Type A) in immission control: evaporative cooling systems, cooling towers, and wet separators
Edition 2021-03

Product data exchange in the building services - Drinking water system assemblies
Edition 2016-01

Level measurement - Microwave methods
Edition 2012-12

Strategic sales - Planning services using Business Coach
Edition 2013-04

Strategic sales - Brand management using Business Coach
Edition 2013-04

Environmental meteorology - Meteorological measurements - Fundamentals
Edition 2013-08

Strategic sales - Develop entrepreneurial successes with business check
Edition 2009-04