https://www.bto.org/our-work/science/publications/reports/research-reports/repetition-historical-pre-war-surveys-project-feasibility
Repetition of Historical (Pre-War) Surveys Project Feasibility Study
Repetition of Historical (Pre-War) Surveys Project Feasibility Study
Citation
Evans, A.D. 1991. Repetition of Historical (Pre-War) Surveys Project Feasibility Study.