00814cam a22002531 4500 gs 47000284 DLC 20260227111353.0 780515s1947 nmua 000 0 eng c gs 47000284 (OCoLC)3895618 U. S. Geological Survey. Library TxEU DLC premarc TN24.N6 A232 no.28 553.69 Clippinger, Donn Merrell, 1915- Pumice aggregate in New Mexico; its uses and potentialities, Donn M. Clippinger and Walter E. Gay. Socorro, 1947. 56 p. illus., plates (2 fold.) 23 cm. New Mexico. Bureau of Mines and Mineral Resources. Bulletin 28 Pumice. Concrete. Gay, Walter E., joint author. 28197 28197