Advancement of seed distribution of improved crop varieties
Heh, C.M.
Advancement of seed distribution of improved crop varieties - Nanking 1935 - 1-25 p. - Crop, Varieties Nanking College and Agriculture. Forestry Secial Report No. 3 .
Advancement of seed distribution of improved crop varieties - Nanking 1935 - 1-25 p. - Crop, Varieties Nanking College and Agriculture. Forestry Secial Report No. 3 .