TY  - GEN
AU  - Roback,Selwyn
TI  - Ephemeroptera nymphs
T2  - Monographs of the academy of natural sciences of Philadelphia
KW  - Entomologie
KW  - Ephemeroptera
KW  - Forêt
KW  - Pérou
KW  - Amazonie
N1  - bibliogr. p. 153-154
ER  -