TY - BOOK ID - 127720093 TI - Changes in sward composition and productivity AU - Charles, A. H. AU - Haggar, R. J. AU - British grassland society PY - 1979 SN - 0905944011 PB - Maidenhead : British grassland society, DB - UniCat KW - Plant and Crop Sciences. Crop Sciences KW - Grasslands. UR - https://www.unicat.be/uniCat?func=search&query=sysid:127720093 AB - ER -