1. Potential effects of surface coal mining on the hydrology of the Greenleaf-Miller area, Ashland coal field, southeastern Montana Author/Creator: Levings, Gary W., author Publication/Creation: Helena, Montana : U.S. Geological Survey, 1983 Resource Type: Book Access & Availability: Loading
2. Potential effects of surface coal mining on the hydrology of the Little Bear Creek area, Moorhead coal field, southeastern Montana Author/Creator: McClymonds, N. E., author Publication/Creation: Helena, Montana : U.S. Geological Survey, 1985 Resource Type: Book Access & Availability: Loading