1928
Board of expert advisors, Frederick Law Olmsted, Duncan McDuffie, and John P. Buwalda, appointed by authority of Congress to study and assist in the solution of Yosemite problems. USNPS, 1928, p. 173.
Maria Lebrado, one of the last of the original Yosemite Indians, gives firsthand account of Yosemite Valley discovery. YNHA, 1928, pp. 41-46; 1929, pp. 69-70, 85-86.
Wildlife research in national parks instituted by George M. Wright, of Yosemite naturalist organization. YNHA, 1929, p. 66; Russell, 1939, p. 10; Wright, Dixon, and Thompson.
W. B. Lewis transferred to Washington; became Assistant Director, National Park Service. E. P. Leavitt designated Acting Superintendent. YNP, 1929.