TY  - SER
AU  - Johnson,Allan
AU  - Sorensen,Harry
ED  - Symposium on industrial minerals of the upper Midwest
TI  - Evaluation of high-purity limestones and dolostones in northern Michigan
SN  - 00167606
KW  - Calcaire substance
KW  - Dolomie
KW  - Substance utile
KW  - Economie evaluation
KW  - Forage au diamant
KW  - Carrière
KW  - Dévonien
KW  - Etats Unis
KW  - Michigan
N1  - <Donation ORSTOM>; bibliogr. p. 640
ER  -