APA

Smithsonian Science Information Exchange, . (1979). Solar energy and nonsossil fuel research a directory of proyect related to agriculture 1976-79. Washington: United States. Department of Agriculture.

Chicago

Smithsonian Science Information Exchange, . 1979. Solar energy and nonsossil fuel research a directory of proyect related to agriculture 1976-79. Washington: United States. Department of Agriculture.

Harvard

Smithsonian Science Information Exchange, . (1979). Solar energy and nonsossil fuel research a directory of proyect related to agriculture 1976-79. Washington: United States. Department of Agriculture.

MLA

Smithsonian Science Information Exchange, . Solar energy and nonsossil fuel research a directory of proyect related to agriculture 1976-79. Washington: United States. Department of Agriculture. 1979.