00321nam a2200145Ia 4500008004100000082001000041082001000051100001400061100001000075245002400085260001100109260003400120260000900154650001200163240117s9999||||xx |||||||||||||| ||und||  aT.R/E  b595.7  asouthwood  at.r.e 0aecological methods   alondon  benglish language book society  c1966  abiology