ISBN-13: 9781519406521 / Angielski / Miękka / 2015 / 142 str.
ISBN-13: 9781519406521 / Angielski / Miękka / 2015 / 142 str.
"Crops and Methods for Soil Improvement" from Alva Agee. Head of department of agricultural extension acting dean and director of the school of agriculture and experiment station of the Pennsylvania State College (1858-1943).