LDGSL/1107/A/1/8
Institute of Geophysics and Planetary Physics, University of California, 1969
Jul-Aug 1969
LDGSL/1107/A/1/11
General scientific correspondence, 1971
Jan-Jul 1971
LDGSL/1107/A/1/32
General correspondence, 1992
1992
LDGSL/1107/A/1/37
General correspondence, 1997
Jan-Dec 1997