TY - RPRT TI - Factors limiting the sensitivity and dynamic range of a seismic system employing analog magnetic tape recording and a seismic amplifier with adjustable gain settings and several output levels AU - Jerry P. Eaton AU - John R. Van Schaack PY - 1977 DO - 10.3133/ofr77224 UR - https://pubs.usgs.gov/publication/ofr77224 ID - ofr77224 ER -