German 'Seismik' Mine Unit Open PDF Document Details Document Type Technical Report Publication Date Sep 24, 1945 Accession Number ADA953469 Entities People C. J. Oleniacz H. G. Vogel R. J. Franz W. C. Holmes Tags Communities of Interest C4I DTIC Thesaurus Topics Frequency Frequency Response Microphones Naval Operations Naval Personnel Photographs Skeletal Muscle Transformers Very Low Frequency