436 ANNUAL REPORTS OF DEPARTMENT OF AGRICULTURE. 



BIBLIOGRAPHY. 



The amount of biblioj^raphical work done durint^ the year was 

 notably below that of previous years, both in the main library and 

 in the bureau and division li])raries. This was due principally to 

 depleted stafTs, makino- it didicult to do more than the regular routine 

 work. In the main library the principal bibliographical work was 

 done in connection with correspondence. The library receives 

 numerous requests for lists of references on various scientific and 

 agricultural subjects connected with the work of tlie department, and 

 also requests for the verification of references, including the straight- 

 ening out of bibliographical tangles. 



The librarian of the Jivu'eau of Entomology devoted a very consid- 

 erable part of her time during the year to the preparation of the 

 Index to the Literature of American Economic Entomology, 1915 to 



1919, inclusive. This extensive index, comprising some 50,000 refer- 

 ences, which was begun in January, 1919, was completed in April, 



1920, and is now in the hands of a committee of the American Asso- 

 ciation of Economic Entomologists awaiting funds for publication. 



The library of the Bureau of Entomology has also continued the 

 card index to publications of the Bureau, 51 of these having been 

 indexed during the year, as well as several other publications by 

 other bureaus containing references to entomology, and has con- 

 tinued the preparation of author cards for articles on entomology 

 by members of the Bureau appearing in nondepartmental publica- 

 tions. Brief lists of new books of interest to the Bureau of 

 Entomology have been prepared monthly for the Bureau News Letter. 



In the Office of Farm Management the following lists of references 

 were prepared by the library: Selected list of references on the cost of 

 producing field crops; Selected list of references on the cost of pro- 

 ducing hay; Selected list of references on the cost of producing truck 

 crops; Selected list of references on the cost of potato production; 

 References on labor distribution. The following lists have been 

 revised and brought up to date: Farm management surveys issued 

 by the agricultural experiment stations; Articles relating to farm 

 management that have appeared in the agricultural press; List of 

 books on farm management; State and station publications relating 

 to farm managem.ent; Publications of the United States Department 

 of Agriculture relating to farm management. 



The American Forestry Magazine discontinued last fall the printing 

 of the nionthly list of current literature indexed in the Forest Service 

 library, owing to a change of policy in its pubhcation. The list is 

 now mimeographed each month and circulated to all district foresters, 

 forest supervisors, experiment stations, and the Forest Products 

 Laboratory, as well as to interested persons outside of the Service. 



A number of miscellaneous reference lists on various subjects bear- 

 ing upon the work of the Bureau of Markets have been compiled by 

 the library of the Bureau during the year. Amon^ these may be 

 mentioned an annotated bibliography of official publications relating 

 to the acts administered by the Bureau of Markets and for its devel- 

 opment. The library has also revised and made available for dis- 

 tribution the mimeographed lists of the publications and of the 

 periodical market reports of the Bureau of Markets. 



