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1
by Bartlett, Stephen, Marian, Mary, Taren, Douglas, Muramoto, Myra L.
Published 1998
Springer Netherlands
“... States Bureau of the Census predicts that the elderly will represent 20% of the U.S. population by 2030...”
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2
by French, Geoffrey E., Hill, Alan G.
Published 1971
Springer Berlin Heidelberg
Table of Contents: “... Patterns of Population Distribution -- a) Before the first census -- b) Effects of oil discoveries -- c...”