TY - GEN digital ID - 139580919 TI - JA Etzler's mechanical system, in its greatest simplicity : for agricultural works, formation of ditches, canals, dams, and any excavation, applanation and elevation of ground, eradicating, sawing, and removing trees, crushing and removing rocks, forming terraces on slopes of mountains and other works : patented & practically proved. AU - Etzler, J. A. AU - Gale Cengage Learning PY - 1844 PB - London Sold by J. Cleave DB - UniCat KW - Agricultural machinery KW - Tillage UR - https://www.unicat.be/uniCat?func=search&query=sysid:139580919 AB - ER -