COLLINGS,GILBEART H. COMMERCIAL FERTILIZERS THEIR SOURCES AND USE. McGRAW-HILL BOOK COM.
Chicago Style (17th ed.) CitationCOLLINGS,GILBEART H. COMMERCIAL FERTILIZERS THEIR SOURCES AND USE. McGRAW-HILL BOOK COM.
MLA (8th ed.) CitationCOLLINGS,GILBEART H. COMMERCIAL FERTILIZERS THEIR SOURCES AND USE. McGRAW-HILL BOOK COM.
Warning: These citations may not always be 100% accurate.