Books by Allen Van Heyl
Geology of the upper Mississip
Geology of the upper Mississippi Valley base-metal district
Guidebook to the Upper Mississ
Guidebook to the Upper Mississippi Valley base-metal district
Aeromagnetic and tectonic anal
Aeromagnetic and tectonic analysis of the upper Mississippi Valley zinc-lead district
Copper, zinc, lead, iron, coba
Copper, zinc, lead, iron, cobalt, and barite deposits in the Piedmont Upland of Maryland
Oxidized zinc deposits of the
Oxidized zinc deposits of the United States
The geology of the upper Missi
The geology of the upper Mississippi Valley zinc-lead distict
Rẏaṅ Sārānīy mātā
Rẏaṅ Sārānīy mātā