TY - BOOK ID - 137793194 TI - Appropriate technology : precepts and practices PY - 1981 SN - 0533047447 PB - New York (N.Y.): Vantage Press DB - UniCat KW - Appropriate technology UR - https://www.unicat.be/uniCat?func=search&query=sysid:137793194 AB - ER -