Publication Details Author Plummer, F.B. Publication Year 1944 Keywords Limestone, Rock Wool County Burnet, San Saba, Llano Publication Code MC0033 Series Mineral Resource Circular Publisher Bureau of Economic Geology Geolocation: Get the Publication Free download: BEG-MC0033D.pdf Available to Purchase: Please select (Print Version) Limestones in central Texas suitable for the manufacture of rock wool $2.00