Columbia subject headings:
Adrenal glands.
Endocrine glands.
Endocrinology.
Parathyroid glands.
Thyroid gland.
Harvard subject headings:
Adrenal glands
Endocrine glands
Endocrinology
Parathyroid glands
Thyroid gland
Princeton subject headings:
Adrenal glands.
Endocrine glands.
Endocrinology.
Parathyroid glands.
Thyroid gland.