000 00428cam a2200169ua 4500
020 _c44.75
041 _aeng
_h
082 _a625.12
_bALL/RA
100 _aAllen, Frank C .
245 _aRailroad curves and earth works /
_cFrank C Allen.
_hTextual Documents
260 _aNew York :
_bMcGraw Hill Book Company ,
_c1931.
300 _a290 ; .
365 _a44.75
504 _a
942 _cBK
999 _c2717
_d2717