You asked about the Navajo! :
education, health, and economic problems of the Navajo /
United States, Dept. of the Interior, Bureau of Indian Affairs.

APA Citation

United States. Bureau of Indian Affairs. (1959). You asked about the Navajo!: education, health, and economic problems of the Navajo. Washington: The Bureau.

MLA Citation

United States. Bureau of Indian Affairs. You Asked About the Navajo!: Education, Health, And Economic Problems of the Navajo. Washington: The Bureau, 1959.

Warning: These citations may not always be complete (especially for serials).