00447nam a2200121Ia 4500082002300000100003000023245016800053260003400221300001000255500000500265700002600270700002900296  a370.77025bH224.AE  aHammersley, A. and Others  aApproaches to environmental studies; a handbook for teachers, students and others interested in the world around thembcBy A. Hammersley, E. Jones and G. A. Perry  aLondonbBlandford Pressc1968  a280p.  a  aJones, E. ; jt. auth.  aPerry, G. A. ; jt. auth.