TY - RPRT TI - The Hawaiian Volcano Observatory Polling Telemetry System for low frequency data acquisition AU - G. S. Puniwai AU - K.T. Honma AU - A. J. Largo PY - 1990 DO - 10.3133/ofr90525 UR - https://pubs.usgs.gov/publication/ofr90525 ID - ofr90525 ER -