A bulletin on conservation of natural resources.
Department of Education, the State of Colorado, Inez Johnson Lewis, State Superintendent of Public Instruction

APA Citation

Colorado. Dept. of Education. (1940). A bulletin on conservation of natural resources. [Denver.

MLA Citation

Colorado. Dept. of Education. A Bulletin On Conservation of Natural Resources. [Denver, 1940.

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