Henry Hopp

Henry Hopp · HarperCollins Publishers Ltd

36 sayfa · 1973

Earthworms / Gardening

Henry Hopp · U.S. Dept. of Agriculture

24 sayfa · 1941

Locust trees / Soil conservation

Henry Hopp · Foreign Agricultural Service, U. S. Dept. of Agriculture

Sayfa sayısı yok · 1954

Field experiments / Agriculture / Statistics

Henry Hopp · Shields

64 sayfa · 1954

Kategori yok

Henry Hopp · U.S. Dept. of Agriculture, Office of Foreign Agricultural Relations

23 sayfa · 1952

Agriculture / Mathematical statistics / Research

Henry Hopp · U.S. Dept. of Agriculture, Soil Conservation Service

25 sayfa · 1944

Cork oak / Oak