TY  - BOOK
AU  - Nixon,Marion
AU  - Whiteley,Derek (Derek Alan Alexander).
TI  - The Oxford book of vertebrates  : : cyclostomes, fish, amphibians, reptiles and mammals / illustrations 
SN  - 0199100098
PY  - 1972///
CY  - Oxford : 
PB  -  Oxford University Press, 
KW  - Vertebrates
N1  - Bibl. p. 206. - Index
ER  -