<Ul> <Li> 1964--1980 </Li> <Li> 1980--1991 </Li> <Li> 1991--2008 </Li> </Ul> <Li> 1964--1980 </Li> <Li> 1980--1991 </Li> <Li> 1991--2008 </Li>

Working conditions in the united states in the early 1900’s can best be described as