Columbia subject headings:
Shellfish fisheries--Law and legislation--United States--Handbooks, manuals, etc.
Shellfish fisheries--Sanitation--United States--Handbooks, manuals, etc.
Shellfish--Effect of water pollution on--United States--Handbooks, manuals, etc.
Harvard subject headings:
Shellfish fisheries--Law and legislation--United States--Handbooks, manuals, etc.
Shellfish fisheries--Sanitation--United States--Handbooks, manuals, etc.
Shellfish--Effect of water pollution on--United States--Handbooks, manuals, etc.
Princeton subject headings:
Shellfish fisheries--Law and legislation--United States--Handbooks, manuals, etc.
Shellfish fisheries--Sanitation--United States--Handbooks, manuals, etc.
Shellfish--Effect of water pollution on--United States--Handbooks, manuals, etc.