Tables of geographic positions, azimuths, and distances : together, with lists of barometric altitudes, magnetic declinations, and itineraries of important routes / prepared principally by First Lieut. M.M. Macomb ... from data gathered by parties of the United States geographical surveys west of the 100th meridian, operating in the states and territories of California, Colorado, Nebraska, Nevada, Oregon, Arizona, Idaho, Montana, New Mexico, and Wyoming, under the directions of Capt. Geo. M. Wheeler ... in charge. 1883.