@inbook {61,
	title = {Echinoderma I. Asteroidea, Ophiuroidea et Echinoidea},
	booktitle = {Beitr{\"a}ge zur Kenntnis der Meeresfauna Westafrikas},
	volume = {1},
	year = {1914},
	pages = {127-303},
	publisher = {L. Friederichsen \& Co.},
	organization = {L. Friederichsen \& Co.},
	address = {Hamburg},
	author = {Koehler, R.},
	editor = {Michaelsen, E.}
}
