au.\*:("HETHERINGTON RM")
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Selection :
ANNUAL DEPARTMENTAL REPORTS 1967-1968.HETHERINGTON RM.1969; COMMISSIONER.OF.MINES.HONGKONG.; 1969, P. 1 A 29Miscellaneous
ANNUAL DEPARTMENTAL REPORT.HETHERINGTON RM.sd1971, P. 1 A 32Miscellaneous