Q. poverty 1928,1948,1968,1988
Can you be more specific about what you need with regards to Poverty? Reference information? Or are you needing full-text articles about poverty in each of those eras?
How much information do you need?
If you go to Ebscohost e.g. and use Social Science Index Full-text database, and do a search combining
Poverty and 1920's you should find information. You can do the same for each of the other eras.
If you need any further help, email me back or we can chat.