Black, C. A. (1973). Soil plant relationship (2.). Wiley Eastern Limited.
Chicago Edition CitationBlack, C A. Soil Plant Relationship. 2. New Delhi: Wiley Eastern Limited, 1973.
ציטוט MLABlack, C A. Soil Plant Relationship. 2. Wiley Eastern Limited, 1973.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.