TY - RPRT TI - Rb/Sr isotopic ratios in selected lower crust-upper mantle nodules from Colorado-Wyoming kimberlites AU - C.B. Smith AU - M. E. McCallum AU - C. E. Hedge PY - 1982 DO - 10.3133/ofr82178 UR - https://pubs.usgs.gov/publication/ofr82178 ID - ofr82178 ER -