1 | Humber estuary : state of the environment 1998 |
2 | 'Sea Vigil' water quality monitoring : the Humber estuary 1992-1993 |
3 | 'Sea Vigil' water quality monitoring : the Humber estuary 1994 |
4 | National marine baseline survey 1995 : littoral cell 2 : Flamborough Head to the Wash |