Engineer soldier's handbook. (open access)

Engineer soldier's handbook.

Describes the tools and tasks of the engineer soldier. Includes a proficiency test for soldiers in training.
Date: June 2, 1943
Creator: United States. War Department.
System: The UNT Digital Library
The ecology of the principal summer weed hosts of the beet leafhopper in the San Joaquin Valley, California. (open access)

The ecology of the principal summer weed hosts of the beet leafhopper in the San Joaquin Valley, California.

Describes the results of a scientific study on the effect of summer weeds on crops (mainly sugar beets and tomatoes) and the use of the beet leafhopper to reduce their growth in the San Joaquin Valley in California.
Date: June 1943
Creator: Lawson, Francis R. (Francis Raymond), 1906- & Piemeisel, R. L.
System: The UNT Digital Library