Understanding the twentieth century decline in chronic conditions among older men - Costa, Dora L. (Cambridge National Bureau of Economic Research, 1998)
Keywords: Occupational diseases -- History -- 20th century. -- United States; Industrial safety -- History -- 20th century. -- United States; Communicable diseases -- Prevention -- History -- 20th century. -- United States; Aged men -- Health and hygiene -- History -- 20th century. -- United States