APA

Zack A. L., . (1988). A well system to recover usable water from a freshwater-saltwater aquifer in Puerto Rico. Washington, D.C: U.S. Gov. Print. Off.

Chicago

Zack Allen L, . 1988. A well system to recover usable water from a freshwater-saltwater aquifer in Puerto Rico. Washington, D.C: U.S. Gov. Print. Off.

Harvard

Zack A. L., . (1988). A well system to recover usable water from a freshwater-saltwater aquifer in Puerto Rico. Washington, D.C: U.S. Gov. Print. Off.

MLA

Zack Allen L, . A well system to recover usable water from a freshwater-saltwater aquifer in Puerto Rico. Washington, D.C: U.S. Gov. Print. Off. 1988.