50273474
9780331686449
Parr, Samuel Wilson is the author of 'I. Potash Shales of Illinois; II. Geology, Distribution, and Occurrence in Union County; III. Finely-Ground Shale As a Source of Potassium or Soil Improvement : A Joint Publication by the Division of Applied Chemistry of the University of Illinois; the Il', published 2017 under ISBN 9780331686449 and ISBN 0331686449.
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