Dr. Bernd Stein
Inhaber
Telefon 0228 62 75 13
Mobil 0171 93 89 048
E-Mail stein@bonner-energie-institut.de
Dr. Michael Krumpholz
Partner
Telefon 0228 40 97 - 34 63
Mobil 0177 66 10 430
E-Mail krumpholz@bonner-energie-institut.de