Ferrini, Rebecca
Health in the later years
McGraw-Hill, 2013
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Looking back : 30 years later
Artikel Jurnal
Thomas, Hugh
The Cuban revolution: 25 years later
Colorado Westview Press, 1984
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Brazilian immunology: one hundred years later
Artikel Jurnal
UNESCO in Asia and the Pacific: 40 years on
Unesco Regional Office for Education in Asia and the Pacific, 1986
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