000 00260nam a2200109Ia 4500
008 220726s9999 xx 000 0 und d
020 _a92-2-101774-5
100 _aSinger, Hans
245 0 _aTechnologies for Basic Needs
250 _a1st.
260 _aGeneva
_c1977
999 _c1671
_d1671