Studies on contact insecticides /
by Charles H. Richardson and C.R. Smith.

APA Citation

Richardson, C. H. (Charles Howard)., Smith, C. Robert. (1923). Studies on contact insecticides. Washington, D.C.: U.S. Dept. of Agriculture.

MLA Citation

Richardson, Charles H. (Charles Howard), 1887-, and Claude Robert Smith. Studies On Contact Insecticides. Washington, D.C.: U.S. Dept. of Agriculture, 1923.

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