Pyenson , Louis L.
Elements of plant protection / Louis l . Pyenson - New York : John willey & Sons, Chapman & Hall , c1951. - x ,538 p. : ill, ; 20 cm.
includes index.
includes index References.
632.9 / PYE
Elements of plant protection / Louis l . Pyenson - New York : John willey & Sons, Chapman & Hall , c1951. - x ,538 p. : ill, ; 20 cm.
includes index.
includes index References.
632.9 / PYE