1 | Humber estuary : state of the environment 1998 |
2 | A desk study of the available information on wintering waterfowl feeding in the Wash, Lincolnshire and Norfolk |
3 | 'Sea Vigil' water quality monitoring : the Humber estuary 1992-1993 |
4 | 'Sea Vigil' water quality monitoring : the Humber estuary 1994 |