"PC80-1-A47.""Issued October 1981.""Population Division."--T.p. verso.Mode of access: Internet.
"PC80-1-A51.""Issued February 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A24.""Issued January 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A32.""Issued February 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A52.""Issued October 1981.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A7.""Issued October 1981.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A13.""Issued October 1981.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A39.""Issued December 1981.""Population Division"--T.p. verso.Mode of access: Internet.2 1
"PC80-1-A8.""Issued December 1981.""Population Division"--T.p. verso.Mode of access: Internet.2 1
"PC80-1-A36.""Issued December 1981.""Population Division"--T.p. verso.Mode of access: Internet.2 1
"PC80-1-A33.""Issued January 1982.""Population Division."--T.p. verso.Mode of access: Internet.
"PC80-1-A38.""Issued January 1982.""Population Division."--T. p. verso.Mode of access: Internet.
"PC80-1-A50.""Issued January 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A29.""Issued December 1981.""Population Division"--T.p. verso.Mode of access: Internet.2 1
"PC80-1-A35.""Issued February 1982.""Population Division."--T.p. verso.Mode of access: Internet.
"PC80-1-A26.""Issued January 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A51.""Issued February 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A24.""Issued January 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A32.""Issued February 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A52.""Issued October 1981.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A7.""Issued October 1981.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A13.""Issued October 1981.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A39.""Issued December 1981.""Population Division"--T.p. verso.Mode of access: Internet.2 1
"PC80-1-A8.""Issued December 1981.""Population Division"--T.p. verso.Mode of access: Internet.2 1
"PC80-1-A36.""Issued December 1981.""Population Division"--T.p. verso.Mode of access: Internet.2 1
"PC80-1-A33.""Issued January 1982.""Population Division."--T.p. verso.Mode of access: Internet.
"PC80-1-A38.""Issued January 1982.""Population Division."--T. p. verso.Mode of access: Internet.
"PC80-1-A50.""Issued January 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A29.""Issued December 1981.""Population Division"--T.p. verso.Mode of access: Internet.2 1
"PC80-1-A35.""Issued February 1982.""Population Division."--T.p. verso.Mode of access: Internet.
"PC80-1-A26.""Issued January 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A51.""Issued February 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A24.""Issued January 1982.""Population Division"--T.p. verso.Mode of access: Internet.
"PC80-1-A32.""Issued February 1982.""Population Division"--T.p. verso.Mode of access: Internet.