000			00470cam a22001571 4500
082			_a625.12 _bALL _cL-18, P-2
100	1		_aAllen, C. Frank
245	0	0	_aRailroad curves and earthwork, _cby C. Frank Allen ...
250			_a7th ed., rev.
260			_aNew York, _aLondon, _bMcGraw-Hill Book Company, inc., _c1931.
300			_axiii, 235 p. _bdiagrs. _c18 cm.
650		0	_aRailroads _xCurves and turnouts.
650		0	_aRailroads _xEarthwork.
650		0	_aMCE
942			_cBK
999			_c7558 _d7558