Butterfly monitoring scheme: review and suggestions for the future /
Pollard, E.
Greatorex-Davies, J. N.
Institute of Terrestrial Ecology.
Natural Environment Research Council (Great Britain)
Joint Nature Conservation Committee.
[England?] : Institute of Terrestrial Ecology, Natural Environment Research Council,
1997.
"ITE project TO2054h5 JNCC Project 017."
"JNCC/NERC Contract HF3-08-29(A)"
"JNCC/EP Contract F73-10-01."
"May 1997."