@book{20182,
	author = {Arana, Marcelino de.},
	title = {El cultivo de trigo en el clima subtropical},
	publisher = {s.e),},
	year = {(s.a.)},
	address = {(s.l. :},
	note = {Ponencia presentada en: Congreso Internacional de Agricultura Tropical y Subtropical. Sevilla, 1929}
}