@incollection{gledocs_11858_7013,
author = {Reitner, Joachim and Keupp, H.},
editor = {Reitner, Joachim},
title = {The fossil record of the Haplosclerid excavating sponge Aka de Laubenfels},
booktitle = {Fossil and recent sponges},
year = {1991},
publisher = {Springer},
publisher = {Berlin [u.a.]},

note = { \url {http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/7013}},
}