revised scientific names. Any changes such as in nomenclature, if stated 

 on the title page, are indicated in the citations. Where the reprint is by a 

 different publisher, both printings are mentioned. Thus, prospective 

 purchasers will know the book is now available again, but that the 

 information has not been updated. To cite the year of a reprint as if it 

 were new without mention of the original date would be misleading. 



Certain articles cited have been published in serials or periodicals and 

 may have been circulated also as reprints or separates. These mostly 

 technical references may not be readily available except in specialized or 

 university libraries. Titles of periodicals have been abbreviated accord- 

 ing to this list: National Clearinghouse for Periodical Title Word Ab- 

 breviations, Word- Abbreviation List, 1971 Ed. 42 p. American National 

 Standards Institute, Standards Committee Z39, Columbus, Ohio. 



Availability and prices of references are not indicated, because of 

 changing information. Books of commercial publishers and university 

 presses currently in print and their prices are usually listed in the annual 

 compilations of "Books in Print" (R. R. Bowker Co. 1975 A), to be found 

 in the reference section of libraries. Publications of State and Federal 

 agencies are sold generally at nominal cost, while some popular leaflets 

 are distributed free. 



Many U.S. Government publications can be purchased from the Super- 

 intendent of Documents, U.S. Government Printing Office, Washington, 

 D.C. 20402, or can be obtained from the publishing agency. Some old 

 titles are cited as out of print. Others not so designated may also be 

 exhausted or may have been superseded by later ones. 



So lures. This bibliography follows others listed under A. Bibliog- 

 raphies (page 5), which may be consulted for older titles. It is expanded 

 from a list by the first author (Little 1965 A). 



The collection of books and other references and the card file in the 

 Dendrology Project, Timber Management Research, served as a starting 

 point for this compilation. The bibliographies cited above have been 

 useful, especially for older references since revised or reprinted. 



In 1966 and again in 1975, requests were made to each State forester 

 for citations of current publications in use and for copies of those avail- 

 able. This cooperation is appreciated. 



Bibliographies and abstract periodicals of current literature have been 

 checked carefully for the years from 1950 to 1975. Bibliography of Ag- 

 riculture, prepared in the National Agricultural Library, and Forestry 

 Abstracts have been especially helpful. 



Catalogs and references were searched at the National Agricultural 

 Library, United States Department of Agriculture, Beltsville, Md., and 

 the Botany Library, United States National Museum of Natural History, 

 Smithsonian Institution, Washington, D.C. The first named has nearly 

 all the titles cited. Additional work was done at three other local collec- 

 tions: the Library of Congress, the National Resources Library of the 



