Efficient ultrasonic grinding: a new technology for micron-sized coal. Quarterly technical progress report no. 4, June 16, 1980-September 15, 1980 [report]

W.B. Jr. Tarpley, P.L. Howard, G.R. Moulder
1980 unpublished
doi:10.2172/6734664 fatcat:h2wgv7nvqffazdyranmnsi7h3m