RT Book T1 Ground and air survey for field scientists T2 Monographs on soil and resource surveys T2 Oxford Science Publications A1 Wright, John LA English PP Oxford PB Clarendon Press YR 1982 UL https://ixtheo.de/Record/014344777 CN TA545 SN 0198575602 SN 0198576013 K1 Surveying K1 Aerial photogrammetry