@book{44548,
	author = {Teiwes, Gerd. and Piña Gruneberg, Franz.},
	title = {Conocimiento y experiencias en la fertilización de la piña},
	publisher = {Verlagsgesellschaft fur Ackerbau,},
	year = {1963},
	series = {Boletín verde},
	address = {Hannover :}
}