Middleton, Jefferson Statistics of the Clay-working industries in the United States in 1913. - Washington, D.C. Government Printing Office 1914 - pp. 545-648 - Mineral Resources of the United States, calendar year 1913-Part II . Impreso Ingles Subjects--Topical Terms: MINERIAARCILLA Subjects--Index Terms: INDUSTRIAS ARCILLOSAS Dewey Class. No.: 552.5