AVAILABILITY OF REFERENCES CITED 



Loans . Publications listed in this bibliography may be used in the National Agricul- 

 tural Library's Reading Room. They are loaned by special arrangement only. 



Reproduction. Microfilm or photoprint copies of any portion of the publications listed 

 in this bibliography may be obtained by placing an order with the National Agricultural 

 Library at the address noted below. Copying charges are: 



MICROFILMS: $1.00 for each 30 pages or fraction copied 

 from a single article or book. 



PHOTOPRINTS: $1.00 for each 4 pages or fraction copied 

 from a single article or book. 



RUSH SERVICE: $1.00 additional for each order. 



Payment must accompany the order. Cash^ Library coupons, check or money order drawn 

 to the National Agricultural Library are acceptable. Payment for orders originating 

 outside of the United States should be made by International Money order or draft on 

 an American bank, or by UNESCO book coupons. Superintendent of Documents coupons and 

 requests to furnish photocopy to be paid from Superintendent of Documents Deposit 

 funds cannot be honored. Credit may be extended to Government agencies and institu- 

 tions. Billing address, if other than the mailing address, should be indicated in the 

 appropriate place. Please include ZIP code in all addresses. 



Library Coupons . National Agricultural Library coupons, valued at $1.00 each, may be 

 purchased in any quantity. 



Address . Orders for photocopy or Library coupons, requests for order blanks, or 

 questions regarding loan arrangements may be sent to: 



U. S. Department of Agriculture 

 National Agricultural Library 

 Division of Lending 

 Washington, D. C. 20250 



PLEASE GIVE COMPLETE BIBLIOGRAPHIC INFORMATION AS IT APPEARS IN THIS PUBLICATION FOR 

 EACH ITEM REQUESTED. 



