00556nam a22002057a 4500 BD-DhSAU 660 BD-DhSAU 20150105231800.0 150105b1951 enka||||r|||| 001 0 eng d BD-DhSAU 22 632.9 PYE Pyenson, Louis L. Elements of plant pathology / Louis L. Pyenson London : John Wiley & Sons, Inc. ; c1951. x, 538 p. : ill. ; 21 cm Includes index. joy Plant pathology. Plant protection. ddc BOOK 660 660