2906. Roosevelt, Theodore, Jr.: 1927-28.
2907. Roosevelt, Theodore, Jr.: 1928.
2908. Roosevelt, Theodore, Jr.: 1930.
2909. Roscoe, John H.: 1954-56.
2910. Rose, Rufus E.: 1956.
2911. Rose, W.R.: 1956.
2912. Rosen, Herbert: 1959.
2913. Rosenwald, Julius: 1930.
2914. Ross, Frank, Jr.: 1956-67.
2915. Ross, John M.: 1955-56.
2916. Ross, John M.: 1956.
2917. Royal Geographic Society: 1928-31.
2918. Royal Geographic Society: 1935-36.
2919. Royal Geographic Society: 1936-55.
2920. Royal Geographic Society: 1957-58.
2921. Rubin, Mr.: 1958.
2922. Rumill, Arthur: 1937.
2923. Ruppert, Jacob: 1934.
2924. Russell, Richard S.: 1933.
2925. R, miscellaneous (R-Rh): 1931-65.
2926. R, miscellaneous (Ri-Rz): 1931-74.
2927. R, miscellaneous: 1926-27.
2928. R, miscellaneous: 1927-28.
2929. R, miscellaneous: 1928.
2930. R, miscellaneous: 1928.
2931. R, miscellaneous: 1928-30.
2932. R, miscellaneous: 1929-30.
2933. R, miscellaneous: 1930.
2934. R, miscellaneous: 1930.
2935. R, miscellaneous: 1931.
2936. R, miscellaneous: 1931.
2937. R, miscellaneous: 1932.
2938. R, miscellaneous: 1932.
2939. R, miscellaneous: 1933.
2940. R, miscellaneous: 1933-34.
2941. R, miscellaneous: 1933-35.
2942. R, miscellaneous: 1935-36.
2943. R, miscellaneous: 1935-36.