Aerial photography and remote sensing for soil survey 2026-02-15T22:46:07+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - White, L. P. (Leslie Paul) (Monographs on soil survey, 1977)