TY  - BOOK
ED  - Charles Darwin Foundation
TI  - Scientific and conservation reports: numbers 21, 22 and 23 
U1  - 506 23
PY  - 1970///-1971
CY  - Puerto Ayora, Galápagos, Ecuador
PB  - Charles Darwin Foundation
N1  - Scientific and conservation report : no. 23, May to August 1971; Peter Kramer and José Villa R; (p. 1-8) --; Scientific and conservation report : no. 22, January to April 1971; Peter Kramer and Juan Black M; (p. 1-8) --; Scientific and conservation report : no. 21, September to December 1970; Peter Kramer and Juan Black M; (p. 1-9)
ER  -