(1980). The role of phosphorus in agriculture. Madison, Wis: American Society of Agronomy.
Trích dẫn kiểu ChicagoThe Role of Phosphorus in Agriculture. Madison, Wis: American Society of Agronomy, 1980.
ציטוט MLAThe Role of Phosphorus in Agriculture. Madison, Wis: American Society of Agronomy, 1980.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.