APA
Cooley D. C., National Bureau of Economic Research & Smith S. M. (2022). Center pivot irrigation systems as a form of drought risk mitigation in humid regions. Cambridge: NBER.
Chicago
Cooley Daniel C, National Bureau of Economic Research and Smith Steven M. 2022. Center pivot irrigation systems as a form of drought risk mitigation in humid regions. Cambridge: NBER.
Harvard
Cooley D. C., National Bureau of Economic Research and Smith S. M. (2022). Center pivot irrigation systems as a form of drought risk mitigation in humid regions. Cambridge: NBER.
MLA
Cooley Daniel C, National Bureau of Economic Research and Smith Steven M. Center pivot irrigation systems as a form of drought risk mitigation in humid regions. Cambridge: NBER. 2022.