U. Usa

发表

Diagnosis and improvement of saline and alkali soils.

U. Usa, 1954 .

Yearbook of agriculture.

U. Usa, U.S.D.A. Usa, 1936 .

Manual for Testing Agricultural and Vegetable Seeds

U. Usa, 1953, Agronomy Journal.

Handbook of agricultural charts 1968.

U. Usa, 1964 .

Testing agricultural and vegetable seeds.

U. Usa, 1952 .