1. A minimum age for the Premier kimberlite pipe yielded by biotite Rb-Sr measurements, with related galena isotopic data;Allsopp;Earth Planet. Sci. Lett.,1967
2. Rb-Sr age measurements on the Umkondo dolerites of Rhodesia (Abstr.);Allsopp;Spec. Pub. Geol. Soc. S. Africa,1973
3. Geochronologic studies of the Prospect, Ansonia and Milford formations, southern Connecticut;Armstrong;State Geol. Nat. Hist. Surv. Conn. Rept. Invest.,1970
4. The Mugford Group volcanics of Labrador: age, chemistry and tectonic setting;Barton;Can. J. Earth Sci.,1975
5. A review of the geochronologic framework of the Limpopo mobile belt;Barton;Geol. Surv. Botswana Bull.,1977