TY - JOUR T1 - SEM Atlas of type and figured material from Robert Lagaaij's 'The Pliocene Bryozoa of the Low Countries' (1952) JF - Mededelingen Rijks Geologische Dienst Y1 - 1989 A1 - Bishop, J.D.D. A1 - Hayward, P.J. VL - 43 SN - 90-72869-03-6 ER -