Text ( visual ) : unmediated Population abstract, 1970-1981. -- Port of Spain, Trinidad and Tobago : Ministry of Finance and Planning , Central Statistical Office , c1986. -- ix, 48 p. : ill. ; 28 cm. -- Cover title. -- (BA76767897) ; https://ci.nii.ac.jp/ncid/BA76767897 Author Heading(s): Trinidad and Tobago. Central Statistical Office. -- Classification(s): LCC : HA867 ; DC19 : 304.6/097298/3021. -- Subject Heading(s): LCSH : Trinidad and Tobago -- Population -- Statistics