// todo need optimize like in event.jsp. Add indexing or not indexing this page. helicopters invented (30 дек 1938 г. – 28 фев 1941 г.) (Лента времени)
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helicopters invented (30 дек 1938 г. – 28 фев 1941 г.)

Добавлено на ленту времени:

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ByAnna Huey
19 ноя 2018

Дата:

30 дек 1938 г.
28 фев 1941 г.
~ 2 years and 2 months
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