@book{90142,
	author = {Kalckmann, R.E.},
	title = {A adubacao, 1: fator basico para aumentar a producao brasileira de alimentos [arroz, Oryza sativa, trigo, Triticum spp., milho, Zea mays, soja, Glycine max, mandioca, Manihot esculenta, cana de acucar, Saccharum officinarum, Sao Paulo, Rio Grande do Sul, Pernambuco]},
	url = {https://seer.sct.embrapa.br/index.php/pab/article/view/18019/12084}
}