February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Ellen Wohl offers a survey of the history & present condition of river systems across the US. After describing the biological chemical & physical aspects of the functioning of rivers, she discusses the changes as the result of development & federal management, & examines rehabilitation projects.

A bibliography comprising annotated citations of 2037 scientific and technical publications from ten series issued by the U.S. Fish and Wildlife Service. Includes a six-page introduction containing a history of the Service and a description of the research and development series.