APA

Department of Agricultural Engineering. Purdue Uniersity, . (1971). Biological effects in the hydrological cycle. Indiana: Department of Agricultural Engineering.

Chicago

Department of Agricultural Engineering. Purdue Uniersity, . 1971. Biological effects in the hydrological cycle. Indiana: Department of Agricultural Engineering.

Harvard

Department of Agricultural Engineering. Purdue Uniersity, . (1971). Biological effects in the hydrological cycle. Indiana: Department of Agricultural Engineering.

MLA

Department of Agricultural Engineering. Purdue Uniersity, . Biological effects in the hydrological cycle. Indiana: Department of Agricultural Engineering. 1971.