1. Hydraulic conductivity, specific yield, and pumpage--High Plains Aquifer system, Nebraska Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Denver Colorado : Open-File Services Section, Western Distribution Branch, U.S. Geological Survey Resource Type: Map Access & Availability: Loading
2. Hydrologic analysis of the High Plains aquifer system in Box Butte County, Nebraska Author/Creator: Pettijohn, Robert A., author Publication/Creation: [Reston, Virginia?] : U.S. Geological Survey, 1984 Resource Type: Book Access & Availability: Loading