Author · 1910
Paul R. Shaffer
Fossils
Frank Harold Trevor Rhodes
Fossils
Extension of Tazewell glacial substage of western Illinois and eastern Iowa
Paul R. Shaffer
Extension of Tazewell glacial substage of western Illinois and eastern Iowa
Farmdale drift in northwestern Illinois
Paul R. Shaffer
Farmdale drift in northwestern Illinois
Shore erosion on Sandusky Bay
Paul R. Shaffer
Shore erosion on Sandusky Bay
The golden stamp book of rocks and minerals
Paul R. Shaffer
The golden stamp book of rocks and minerals
No quotes yet. Add a line of Paul R. Shaffer’s that stayed with you.