THE TREND OF MATERNAL-MORTALITY RATES IN THE UNITED STATES DEATH-REGISTRATION AREA, 1900-1921
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1935 ◽
Vol 29
(4)
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pp. 610-612
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2011 ◽
Vol 56
(4)
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pp. 404-405
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1935 ◽
Vol 50
(2)
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pp. 566
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2020 ◽