Beaumont, J. H.
A hand-operated winnower / J.H. Beaumont. - London : Tropical Products Institute, c1981. - 25 p. : ill. - Rural technology guide ; 11 .
0859541223
Fanning mills.
A hand-operated winnower / J.H. Beaumont. - London : Tropical Products Institute, c1981. - 25 p. : ill. - Rural technology guide ; 11 .
0859541223
Fanning mills.