TY  - BOOK
AU  - Herdman,W.A.
TI  - Report to the government of Ceylon on the pearl oyster fischeries of the gulf of Manaar: with supplementay reports upon the marine biology of Ceylon, bt other naturalists 
PY  - 1903///-1906
CY  - London
PB  - published at the request of the colonial government by the R. Society
ER  -