Seller: GreatBookPrices, Columbia, MD, U.S.A.
Condition: New.
Seller: GreatBookPrices, Columbia, MD, U.S.A.
Condition: As New. Unread book in perfect condition.
Seller: GreatBookPricesUK, Woodford Green, United Kingdom
US$ 137.64
Quantity: Over 20 available
Add to basketCondition: New.
Seller: GreatBookPricesUK, Woodford Green, United Kingdom
US$ 133.08
Quantity: Over 20 available
Add to basketCondition: New.
Condition: New.
Seller: GreatBookPricesUK, Woodford Green, United Kingdom
US$ 149.36
Quantity: Over 20 available
Add to basketCondition: As New. Unread book in perfect condition.
Seller: GreatBookPricesUK, Woodford Green, United Kingdom
US$ 246.39
Quantity: Over 20 available
Add to basketCondition: As New. Unread book in perfect condition.
Condition: As New. Unread book in perfect condition.
Condition: Good. Willow Grove, PA: Naval Air Station, 1948. Sm 4to. Paper wraps with metal closure. 13pp. Illustrations. Good copy. Covers creased and soiled. An early example of Ground-Controlled Approach (GCA), a radar-based procedure in which an air traffic controller guides and aircraft to a safe landing using verbal instructions. It was first put in practice in 1942 and extensively used by the US in World War 2. No copies on OCLC. (Ground Controlled Approach, Air Traffic, Aviation) Inquire if you need further information.