Columbia subject headings:
Chemistry--Study and teaching (Higher)--Canada--Directories.
Chemistry--Study and teaching (Higher)--United States--Directories.
Universities and colleges--Canada--Directories.
Universities and colleges--United States--Directories.
Harvard subject headings:
Princeton subject headings:
Chemistry--Study and teaching (Higher)--Canada--Directories.
Chemistry--Study and teaching (Higher)--United States--Directories.
Directories.
Universities and colleges--Canada--Directories.
Universities and colleges--United States--Directories.