Keywords: FMIB 38285 Belt grinders, where blanks are brought to uniform thickness.jpeg Belt grinders where blanks are brought to uniform thickness Subject Pearl button industry Women clothing workers Tag Shellfish 1921 Cite book Fresh-water Mussels and Mussel Industries of the United States Coker Robert E Washington DC Government Printing Office 1921 Bulletin of the United States Bureau of Fisheries vol 36 1917-1918 Plage XXXIX-1 Creator Robert Ervin Coker PD-UWASH-FMIB Institution University of Washington FMIB-source accession number 38285 Images from the Freshwater and Marine Image Bank to check Robert Ervin Coker Shell buttons |