@article {6, title = {SEM Atlas of type and figured material from Robert Lagaaij{\textquoteright}s {\textquoteright}The Pliocene Bryozoa of the Low Countries{\textquoteright} (1952)}, journal = {Mededelingen Rijks Geologische Dienst}, volume = {43}, year = {1989}, chapter = {1}, isbn = {90-72869-03-6}, author = {Bishop, J.D.D. and Hayward, P.J.} }