Apollo fuel cell power plant
1972
1972
(1962); 1982
2000-100 BCE
circa 1972
1990-96
1903 (original); 1982 (model)
4000-2001 BCE
1972
1972
1972
1972
1989-08
1972
1972
1972-3
2500 BCE
1972
1972
1972
1972
1972
1990-95
1972
1972
1972
1859; 1986
1972
1972
1937; 1980
1972
3000-1500
3000-2000 BCE
1970 and post 1989
2000 BCE
1972
1972
1972
1972
1972
1972
1972
1972
1972
1972
30 CE
30 CE
1972
1972
1972
1972