Trask, Amanda E ; Bignal, Eric M ; Fenn, Sarah R... Trask , A E , Bignal , E M , Fenn , S R , McCracken , DI , Monaghan , P & Reid , J M 2020 , Conservation strategy for red-billed choughs in Scotland: Assessment of the impact of supplementary feeding and evaluation of future management strategies . vol. Research Report 1152 , Scottish Natural Heritage ..
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2020