Aryan family, [iv. 16], [70], [71].
Aryan language, seven periods of, [iv. 118].
—— first period, [iv. 119].
—— second period, [iv. 124].
—— third period, [iv. 124].
—— fourth period, [iv. 129].
—— fifth period, [iv. 131].
—— sixth period, [iv. 135].
—— seventh period, [iv. 135].