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K. B. Wilson, R. C. Ladd, and M. Saslow Community Based Care in an Institution: NewApproaches and Defi nitions of Long Term Care, доклад на 41 й ежегодной научной конференции Американского геронтологического общества, Сан-Франциско, ноябрь 1988 г. Цит. по Wilson Historical Evolution.