Causes of spatial and temporal patterns in rocky intertidal communities of central and northern California /

Mode of access: Internet.

Spatial and temporal variations in geometric and material properties of a natural beach /

"June 1974."

Changes in spatial grain-price patterns in the United States and in the North Central region, 1946-1958 /

"Agricultural experiment stations of Alaska, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, Wisconsin, and the U.S. Department of Agriculture, cooperating."