Machineski, Oswaldo, Elcio Liborio Balota, and José Roberto Pinto de Souza. 2011. “Response of Castor Bean to Arbuscular Mycorrhizal Fungi and Levels of Phosphorus”. Semina: Ciências Agrárias 32 (4Sup1):1855-62. https://doi.org/10.5433/1679-0359.2011v32n4Sup1p1855.