000			00752nam a2200229Ia 4500
008			140224s9999 xx 000 0 und d
020			_a9780753405222
050			_aTA 634 _b.P37 2007
100			_aParker, Steve
245			_aI wonder why tunnels are round : _band other questions about building / _cSteve Parker.
260			_aLondon : _bKingfisher Publications Plc, _cc2007.
300			_a32 p : _bcol. ill. ; _c29 cm.
440			_aI wonder why.
650			_aBuildings.
650			_aEarthmoving machinery _xJuvenile literature.
650			_aEarthmoving machinery.
650			_aQuestions and answers.
650			_aStructural engineering _xJuvenile literature.
650			_aStructural engineering.
942			_cBK
999			_c42367 _d42367