000			01267cam a22002531 4500
001			gs 53000080
003			DLC
005			20260227111359.0
008			850718s1952 dcua f000 0 eng c
010			_ags 53000080
035			_a(OCoLC)12280026
040			_aU. S. Geol. Survey. Libr. _cTxHR _dDLC
042			_apremarc
050	0	0	_aQE75 _b.C5 no. 222
082			_a526.91 _a526.98*
110	2		_aGeological Survey (U.S.)
245	1	0	_aTwin low-oblique photography and the Twinplex plotter, _cprepared by the Topographic Division, Research and Technical Control Branch, Section of Photogrammetry.
260			_aWashington, _c1952.
300			_aiii, 18 p. _billus., diagrs. _c27 cm.
440		0	_aGeological Survey circular _v222
500			_a"The text of this circular is an adaptation and combination of the following papers: 1. Hopkins, B. T., 1951, The Twinplex plotter for low-oblique photography. [Unpublished] 2. Radlinski, W. A., 1952, Convergent low-oblique photography and its application to the Twinplex: Photogrammetric engineering, v. 18, no. 3, pp. 596-597. 3. Thompson, M. M., 1950, the Twinplex, a new stereoplotting instrument; U. S. Geological Survey Circ. 82."
650		0	_aPhotographic surveying.
650		0	_aSurveying _xInstruments.
999			_c28714 _d28714