BAVER L. D., GARDNER W. H. & GARDNER W. R.Soil physics. New-York: .
BAVER Léonard David, GARDNER Walter H and GARDNER Wilford R.Soil physics. New-York: .
BAVER L. D., GARDNER W. H. and GARDNER W. R.Soil physics. New-York: .
BAVER Léonard David, GARDNER Walter H and GARDNER Wilford R.New-York: . .