Theobald, G. H.
Methods and machines for tile and other tube drainage / prepared by G.H. Theobald. - Rome : FAO of the United Nations, 1963. - xiii, 104 p. : ill. - FAO agricultural development paper ; no. 78 .
Drainage.
Methods and machines for tile and other tube drainage / prepared by G.H. Theobald. - Rome : FAO of the United Nations, 1963. - xiii, 104 p. : ill. - FAO agricultural development paper ; no. 78 .
Drainage.