TY  - SER
AU  - Schramm,BeatrixG.
AU  - Lance,Valentine A.
AU  - Casares,Miguel
TI  - Reproductive cycles of male and female giant tortoises (Geochelone nigra) on the Galápagos Islands by plasma steriod analysis and ultrasound scanning
U1  - 597.924 23
PY  - 1999///
KW  - Giant tortoise
KW  - Tortuga gigante
KW  - Geochelone nigra
KW  - Reproduction
KW  - Reproducción
KW  - Cycles
KW  - Ciclos
ER  -