Subject
- Nimitz, Chester W. (Chester William) Jr., 1915-20022
- Ohio--Elyria1
- Oil spills3
- Peabody Coal Company1
- Perkin, Richard Scott, 1906-19694
- Perkin-Elmer Corporation103
- Pesticides1
- Philadelphia (Pa.). Police Department1
- Photochemical smog1
- Pollutants1
- Pollution2
- Portrait photography3
- Portraits3
- Quality control3
- Robotics1
- Scientific Data Systems1
- Scientific apparatus and instruments98
- Scientists2
- Serum1
- Shaw, Michael D.1