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| developed = late 20th century (1970s) ...ne''', or '''bloogle resonator''', also sold as '''Free-Ka''' in the 1960s-1970s, is an [[experimental musical instrument]] which consists of a [[wikt:corru ...

...)|4|Pb}}, it was used extensively in [[gasoline]] from the 1930s until the 1970s.<ref>{{harvnb|Love|1998|p=208}}</ref> Although the use of leaded gasoline w ...on of reacting materials).<ref>{{harvnb|Morstein|2005|p=129}}</ref> In the 1970s, [[tantalum]] was found to be more effective than copper in [[shaped charge ...

...wton–Cavendish gravitational constant", appears to have been common in the 1970s to 1980s, especially in (translations from) Soviet-era Russian literature, ...