Analysis of information sources in references of the Wikipedia article "Iron" in English language version.
earliest blast furnace discovered in China from about the first century AD
{{cite book}}
: ISBN / Date incompatibility (help)the blade's composition of iron, nickel and cobalt was an approximate match for a meteorite that landed in northern Egypt. The result "strongly suggests an extraterrestrial origin"
the blade's composition of iron, nickel and cobalt was an approximate match for a meteorite that landed in northern Egypt. The result "strongly suggests an extraterrestrial origin"
{{cite book}}
: ISBN / Date incompatibility (help)