00741nam0-22002771i-450-99000024631040332120001010000024631FED01000024631(Aleph)000024631FED0100002463120001010d--------km-y0itay50------baitay-------001yyStone shelters.Cambridge (Mass.)the Massachussetts Institute of Technologyc1969.210 p. ill. 25 cmAllen,Edward334517ITUNINARICAUNIMARCBK99000024631040332112 MTD 415MTD 1595/184DARPUDARPUStone shelters116510UNINAING01