Hedley, Stuart books & textbook
Freeliving Freshwater Protozoa
J. Patterson, David Hedley, Stuart
CRC Press /1996-05-06 Paperback / 224 Pages
isbn-10: 1874545405 / isbn-13: 9781874545408
Durham Wildlife Audit: The Distribution, Abundance and Conservation of Wildlife in County Durham
Environment Department, Durham County Council /1995-12-01 Paperback
isbn-10: 0951197118 / isbn-13: 9780951197110
