H. Schreyer

Integrated helmet system with image intensifier tubes

H. Schreyer, H.-D.V. Böhm, B. Svedevall, 1994 .

Integrated helmet system testing for a nightflying helicopter

H. Schreyer, H.-D.V. Böhm, 1991 .

Helicopter Integrated Helmet Requirements and Test Results

H. Schreyer, H.-D. Boehm, 1991 .