L. K. Tuck

• Estimates of the volume of water in five coal aquifers, Northern Cheyenne Indian Reservation, southeastern Montana
• Ground-water resources along the Little Bighorn River, Crow Indian Reservation, Montana
• Hydrologic and water-quality data related to the occurrence of arsenic for areas along the Madison and Upper Missouri Rivers, southwestern and west-central Montana
• Reconnaissance of arsenic in surface and ground water along the Madison and upper Missouri rivers, southwestern and west-central Montana