Wheeler Survey field notebook: computations of distances Image Read more about Wheeler Survey field notebook: computations of distances
Wheeler Survey field notebook no. 67: triangulation; topographical records Image Read more about Wheeler Survey field notebook no. 67: triangulation; topographical records
Wheeler Survey field notebook: triangulation; topographical records Image Read more about Wheeler Survey field notebook: triangulation; topographical records
Wheeler Survey field notebook: computations of latitudes and departures, of topographical meanders Image Read more about Wheeler Survey field notebook: computations of latitudes and departures, of topographical meanders
