Columbia subject headings:
Endangered species--Canada.
Endangered species--Maritime Provinces.
Endangered species--New England.
Extinct animals--Canada--History.
Extinct animals--Maritime Provinces--History.
Extinct animals--New England--History.
Nature--Effect of human beings on--Canada.
Nature--Effect of human beings on--Maritime Provinces.
Nature--Effect of human beings on--New England.
Harvard subject headings:
Endangered species--Canada.
Endangered species--Maritime Provinces.
Endangered species--New England.
Extinct animals--Canada--History.
Extinct animals--Maritime Provinces--History.
Extinct animals--New England--History.
Nature--Effect of human beings on--Canada.
Nature--Effect of human beings on--Maritime Provinces.
Nature--Effect of human beings on--New England.
Princeton subject headings:
Endangered species--Canada.
Endangered species--Maritime Provinces.
Endangered species--New England.
Nature--Effect of human beings on--Canada.
Nature--Effect of human beings on--Maritime Provinces.
Nature--Effect of human beings on--New England.