@book{7334,
	author = {European Southern Observatory Workshop on the Need for Coordinated Ground-Based Observations of Halley's Comet and Festou, M., ed. and  European Southern Observatory},
	title = {The need for coordinated ground-based observations of Halley's comet},
	publisher = {European Southern Observatory},
	year = {1982},
	address = {FRG}
}