00693cam a22002411  4500001001300000003000400013005001700017008004100034010001700075035001900092040004000111042001200151050001500163070001500178082000800193100002700201245007600228260002900304300003000333490002200363504004300385650002300428agr51000548 DLC20260227111016.0770207s1951    nyua     b    001 0 eng c  aagr51000548   a(OCoLC)2724767  aU. S. Dept. of Agr. Libr.cNbUdDLC  apremarc00aSB601b.P90 a464.4bP99  a6321 aPyenson, Louis,d1909-00aElements of plant protection.cWith line drawings by Emily B. Steffens.  aNew York,bWiley,c1951.  ax, 538 p.billus.c22 cm.0 aWiley farm series  a"Selected reference books": p. 488-491 0aAgricultural pests