TY - GEN digital ID - 139579431 TI - A review of the question of the outlet lock at Black's Eddy AU - North Branch (writer) AU - Lehigh Coal and Navigation Company. AU - Gale Cengage Learning PY - 1840 PB - [United States? s.n.] DB - UniCat KW - Locks (Hydraulic engineering) -- Pennsylvania KW - Delaware River (N.Y.-Del. and N.J.) KW - Canals -- Pennsylvania UR - https://www.unicat.be/uniCat?func=search&query=sysid:139579431 AB - ER -