1. Hard-end of the ‘Bartlett’ pear and its possible association with various water relationships of the fruit and leaves;Ackley;Wash. Agr. Expt. Sta. Tech. Bull.,1954
2. ‘Anjou’ pear responses to irrigation in a clay adobe soil;Aldrich;Oregon Expt. Sta. Bull.,1940
3. The protection of pome fruits, 1979-March 1985-citations from Agricola concerning diseases and other environmental considerations;Bebee;Bibliographies and literature of Agriculture,1985
4. Beers , E. H. R. P. , Covey C. R. Rom R. Parker L. Askham R. C. Maxwell 1987 Spray guide for tree fruits in Eastern Washington Wash. State Coop. Exten.