Fishery Circulars. 1931-1939. Brief accounts of investigations of 

 economic importance or general interest. Succeeded the Economic 

 Circular series; succeeded by the Circular series of the Fish and Wild- 

 life Service. Fishery Circulars were distributed to depository libraries. 



Fishery Leaflets . 1941- . Correspondence aids giving information on 

 fishes and fisheries. Usually duplicated from typewritten text. The 

 latest issue or revision of each leaflet is listed, without reference to 

 the original issue. 



Investigational Reports . 1931-1939, Results of research and applied 

 science in the fields of biology, technology, economics, and statistics 

 of fisheries. Succeeded by Research Reports. Investigational Reports 

 were distributed to depository libraries. 



Market Development Leaflets . 1949- , Lists of refrigerated locker 

 plants and related data. Duplicated from typewritten text. 



Progressive Fish-Culturist. 1934- . A periodical containing articles 

 for fishery biologists and fish culturists. The periodical was issued 

 monthly from 1934 to 1938 and bimonthly from 1939 to 1941; it was 

 suspended from 1941 to 1946; it has been a quarterly since 1947. The 

 most important articles in the Progressive Fish-Culturist are listed; 

 they have been designated A, B, C, etc., to facilitate reference from 

 the author and subject indexes. The Progressive Fish-Culturist is dis- 

 tributed to depository libraries. 



Regulatory Announcements . 1941- , Informational pamphlets containing 

 the text of current regulations. Only fishery Regulatory Announcements 

 have been listed. Announcements and amendments to current regulations 

 are issued throughout the year. 



Research Reports . 1941- . Technical papers reporting the results of 

 scientific investigations. Succeeded Investigational Reports (and a 

 former wildlife research series). Research Reports are distributed to 

 depository libraries. 



Separates. 1942- . Reprints of articles from the Fish and Wildlife 

 Service monthly journal. Commercial Fisheries Review (called Fishery 

 Market News from 1942 to 1945). Duplicated from typewritten text. 



Special Scientific Reports . 1940-1949. Preliminary reports, progress 

 reports, and reports on investigations of restricted scope, intended to 

 aid management and utilization, and to help guide administrative or 

 legislative action; issued in limited quantities for Federal, State, and 



VII 



