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1
An account of the primary triangulation of Malaya together with the secondary chain through Kelantan and secondary points on Penang Island/
Published 1931“…Kuala Lumpur : Survey Dept,…”
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2
Report of the Malayan Union survey department : for the period 1st January 1947, to 31st December, 1947/
Published 1948“…Kuala Lumpur : Survey Dept.,…”