TY - GEN digital ID - 139576943 TI - Observations on the construction of railways and upon mechanics AU - Dryden, Jonathan AU - Gale Cengage Learning PY - 1829 PB - London Baldwin and Cradock DB - UniCat KW - Railroad engineering KW - Railroads -- Design and construction UR - https://www.unicat.be/uniCat?func=search&query=sysid:139576943 AB - ER -