Time, trave and construction costs of loose and stanchion types of dairy brans,
Barr, W.L.
Time, trave and construction costs of loose and stanchion types of dairy brans, - Pennsylvania 1960 - 0.75 - No. 212; Pennsylvania Agricult .
Time, trave and construction costs of loose and stanchion types of dairy brans, - Pennsylvania 1960 - 0.75 - No. 212; Pennsylvania Agricult .