Farm lighting
Krewatch, A.V., Campbell, L.E.
Farm lighting - Washington 1969 - 1-16 p. - Farm United States Department of Agriculture. Farmers Bulletin No. 2243 .
631.2:628.9
Farm lighting - Washington 1969 - 1-16 p. - Farm United States Department of Agriculture. Farmers Bulletin No. 2243 .
631.2:628.9