| Ga07aa | diersporen | Kloppenburg, J. | Weylin veldgids / Loopsporen | 2017 | Weylin Tracking, z.pl. |
| Ga07aa | diersporen | Grobbe, M. | Weylin veldgids / Spoorvolgen | 2017 | Weylin Tracking, z.pl. |
| Ga07ca | eetsporen (inclusief excrementen) | Kloppenburg, J. | Weylin veldgids / Uitwerpselen | 2018 | Weylin Tracking, z.pl. |
| Gj07ca | zoogdieren | Chanin, P. | Otters | 1993 | Whittet, London |
| Sb03aa | tekst | Westhoff, V. | Peregrinatio / Kwatrijnen | 1995 | Widde Vool, Onnen |
| Oj01ac | Noord-Holland | Lassooy, P. | Monnikenwerk / De invloed van de abdij van Egmond op het landschap van Noord-Kennemerland | 2008 | Wielenmaker, Egmond-Binnen |
| Ha03aa | schimmelkunde/mycologie | Vermeulen, H. | Paddestoelen, schimmels en slijmzwammen van Vlaanderen / Natuurhistorische reeks nr. 99/2 | 1999 | Wielewaal, Turnhout |
| Te01aa | NME-didactiek | Stryckers, P. | Natuur en milieu in educatie / Over inhouden van natuur- en milieueducatie / Groene peper nr. 00-3 | z.jr. | Wielewaal, Turnhout |
| Ge01aa | spinnen | Anonymus | Spinneweb | 2010 | Wikipedia, z.pl |
| Cb00aa | oceanografie | Kroonenberg, S. | Spiegelzee / De zeespiegelgeschiedenis van de mens | 2017 | Wilco, Amersfoort |
| Fb99aa | algen specifiek | Bunker, F.S.D., J.A. Brodie, Chr.A. Maggs & A.R. Bunker | Seaweeds of Britain and Ireland | 2012 | Wild Nature, Plymouth |
| Dd01aa | geomorfologie | Nordstrom, K.F., N. Psuty & B. Carter (red.) | Coastal dunes / Form and process / Coastal Morphology and Research | 1990 | Wiley & Sons, Chichester |
| Cc01aa | klimatologie | Bolin, B., B.R. Döös, J. Jäger & R.A. Warrick | The greenhouse effect / Climatic change and ecosystems / Scope nr. 29 | 1989 | Wiley & Sons, Chichester |
| Ee99aa | landschapsecologie specifiek | Barnes, R.S.K. | The coastline / A contribution to our understanding of its ecology and physiography in relation to land-use and management and the pressures to which it is subject | 1977 | Wiley & Sons, Londen |
| Dg00aa | bodemkunde | Olphen, H. van | An introduction to clay colloïd chemistry / For clay technologists, geologists, and soil scientists | 1966 | Wiley & Sons, Londen |
| Da00aa | aardwetenschappen | Strahler, A.H. & A.N. Strahler | Modern physical geography | 1992 | Wiley & Sons, New York |
| Da00aa | aardwetenschappen | Snead, R.E. | Atlas of world physical features | 1972 | Wiley & Sons, New York |
| Eh03aa | histologie, cytologie en genetica | Gardner, E.J., M.J. Simmons & D.P. Snustad | Principles of genetics | 1991 | Wiley & Sons, New York |
| Eg99aa | microbiologie specifiek | Rheinheimer, G. | Aquatic microbiology | 1974 | Wiley, Londen |
| Fa01ba | plantkunde/botanie | Esau, K. | Anatomy of seed plants | 1977 | Wiley, New York |
