LDGSL/1107/A/1/27
General correspondence, 1987
1987
LDGSL/1107/A/1/32
General correspondence, 1992
1992
LDGSL/1107/B/6/7
Working file for "Estimates of mantle thorium/uranium ratios from Th, U and Pb isotopic...
Aug 1989-Jul 1992
LDGSL/1107/B/6/8
Working files for "The generation of kimberlites, lamproites, and their source rocks" (1994)
1991-Jan 1994