Analysis of information sources in references of the Wikipedia article "Fracking proppants" in English language version.
{{cite web}}
: CS1 maint: url-status (link)labeled Frac Sand...Sc-46, Br-82, Ag-110m, Sb-124, Ir-192
{{cite web}}
: CS1 maint: multiple names: authors list (link)labeled Frac Sand...Sc-46, Br-82, Ag-110m, Sb-124, Ir-192
{{cite web}}
: CS1 maint: multiple names: authors list (link)