Results for "National Science Resources Center (U.S.)"
Ruth Hill at Work
- Date: c. January 1978
- Creator: Unknown
- Creator: Unknown
Skaters on Rock Creek
- Date: c. 1905
- Creator: Unknown
- Creator: Unknown
Skaters on Rock Creek
- Date: c. 1905
- Creator: Unknown
- Creator: Unknown
Visitors to the Zoo Relax by Rock Creek
- Date: c. 1891
- Creator: Unknown
- Creator: Unknown
Betsy Heck Demonstrating Physignotrace
- Date: c. 1986
- Creator: Unknown
- Creator: Unknown
Jean M. Salan
- Date: 1978
- Creator: Unknown
- Creator: Unknown
Skaters on Rock Creek
- Date: 1905
- Creator: Unknown
- Creator: Unknown
Marian Ball With Atlas Lion Cub at NZP
- Date: 1977
- Creator: Unknown
- Creator: Unknown
Doris M. Cochran at Desk
- Date: Unknown, perhaps c. 1930
- Creator: Unknown
- Creator: Unknown
Doris M. Cochran, 1954
- Date: 1954
- Creator: Unknown
- Creator: Unknown
Doris M. Cochran with Snake, 1954
- Date: 1954
- Creator: Unknown
- Creator: Unknown
Doris M. Cochran Holding Frog
- Date: c. 1930s
- Creator: Unknown
- Creator: Unknown
