TY  - BOOK
AU  - Hairston,Nelson G.
TI  - Ecological experiments: purpose, design, and execution 
T2  - Cambrige studies in ecology
SN  - 0521346924 (Pbk)
U1  - 574.50724 
PY  - 1989///
CY  - New York
PB  - Cambridge University Press, 
KW  - ECOLOGIA
KW  - EXPERIMENTOS
ER  -