Alan R. Geyer

• Building stones of Pennsylvania's capital area
• Engineering characteristics of the rocks of Pennsylvania
• Environmental geology for land-use planning
• Environmental geology for land-use planning / Alan R. Geyer, William G. McGlade.
• Geology and mineral resources of the Womelsdorf quadrangle
• Geology of the Lebanon quadrangle
• Geology of the vicinity of the Hershey mine, Hershey, Pennsylvania
• Geology, mineral resources, and environmental geology of the Palmyra Quadrangle
• Geology, mineral resources, and environmental geology of the Palmyra Quadrangle, Lebanon and Dauphin Counties, by Alan R. Geyer
• Mineral collecting in Pennsylvania
• Outstanding scenic geological features of Pennsylvania
• Outstanding Scenic Geological Features of Pennsylvania (Environmental Geology Reports No 7, Pt. 2)