Columbia subject headings:
Launch vehicles (Astronautics)--Cost.
Space vehicles--Cost.
Space vehicles--Design and construction--Cost.
Harvard subject headings:
Astronautics--United States
Launch vehicles (Astronautics)--Design and construction--Costs.
Space vehicles--Design and construction--Costs.
Princeton subject headings:
Astronautics--United States.
Launch vehicles (Astronautics)--Design and construction--Costs.
Space vehicles--Design and construction--Costs.