Causes of illness in 9,000 families, based on nation-wide...

Causes of illness in 9,000 families, based on nation-wide periodic canvasses, 1928–1931

Selwyn D. Collins
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Volume:
7
Year:
1933
Language:
english
Pages:
1
DOI:
10.1007/bf01572465
File:
PDF, 65 KB
english, 1933
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