Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
| Publication Year | 1919 |
|---|---|
| Title | Clays and shales of Minnesota |
| DOI | 10.3133/b678 |
| Authors | Frank F. Grout, Edgar Kirke Soper |
| Publication Type | Report |
| Publication Subtype | USGS Numbered Series |
| Series Title | Bulletin |
| Series Number | 678 |
| Index ID | b678 |
| Record Source | USGS Publications Warehouse |