Ooi, A. C. Clay deposit in the Bahau area, Negeri Sembilan / by A.C.Ooi - Ipoh : Ibu Pejabat Penyiasatan Haiwan, 1978 - 33 p. : ill. - Report of the Industrial Minerals Division; no.MX(N)24/1978 . Subjects--Topical Terms: Clay--Negeri Sembilan