学科
- Conservation & restoration--1930-19401
- Conservation of natural resources--Ohio--1930-19401
- Deer--1930-19401
- Democracy--1930-19401
- Education--Illinois--Chicago--1930-19501
- Education--Ohio--Cincinnati--1930-19401
- Exhibition buildings--New York (State)--New York--1930-19401
- Flowers--1930-19401
- Forests--1930-19401
- Fund raising--New York (State)--Nassau County--1930-19401
- Galleries & museums--Illinois--Chicago--1930-19401
- Libraries--Illinois--Chicago--1930-19501
- Libraries--Pennsylvania--1930-19401
- Milk--19401
- Museum of Science and Industry (Chicago, Ill.)1
- Music education--Ohio--Cincinnati--1930-19401
- National parks & reserves--1930-19401
- National parks & reserves--Utah--1930-19401
- New York World's Fair--(1939-1940 :--New York, N.Y.)--Buildings1
- Nursery rhymes--1930-19401