00339nam a2200133 a 450000500170000002000150001708200210003210000160005310000140006924500440008326000340012730000230016163000210018420251202164126.0  a0194424014  a338.9009172bCAS  aCasley, D.J  aLury, D.A  aData collection in developing countries  aOxfordbClarendon Pressc1984  axii,244 p.b234 cm  aData collecttion