Environmental assessment, proposed development concept, Lukeville, Organ Pipe Cactus National Monument, Arizona /

On cover: Environmental assessment for proposed development concept plan, Organ Pipe Cactus, Lukeville, National Monument, Arizona.

The Cactus journal. Devoted exclusively to cacti and other succulent plants.

F. A. Walton.

Unit graph and loss rate optimization : Hydrologic Engineering Center computer program 23-J2-L211.

At head of title : Generalized computer program.

Unit graph and hydrograph computation : Hydrologic Engineering Center computer program 23-J2-L228.

At head of cover title : Generalized computer program.