"economic source" is correct and usable in written English.
You can use it when referring to a source of economic information or data. For example, "The article cited an economic source to back up its argument."
Keeping that economic source productive is critical to both national prosperity and federal revenues.
The marine-derived A. terreus is suggested as a new potential candidate for industrial enzymatic production of fructose from low cost substrate containing inulin as an economic source.
This study could add economic value to baobab fruit shells in Malawi, reduce disposal problems, and offer an economic source of AC to the AC users.
The metabolites released by feather degradation along with strain PF1 could be successfully employed as an economic source of nitrogen fertilizers for plants.
In the recent years, the government is paying special attention to this economic source of hydro potential and a lot of projects in different regions of the state have been identified.
The optimum values for yield show that it is an economic source of oil, the low saponification value means that it is not a good ingredient for soap making.
Known as glass sands, these strata are important economic sources of silica for glass and chemical industries.
The teeming population of frustrated young people had had their ambitions and hopes raised, but the economic sources of their frustration had worsened in the previous 12 months.
A press release for "Walls and Bridges" describes them, in English, as "three overfamiliar and undertheorized objects of study that are perfectly suited to create a conversation that draws on social, literary, artistic, political and economic sources".
The social functions are mainly seeing sons as economic sources, as pensions, and with religious function.
First, a long agricultural tradition and agricultural production require high physical demands, and men became the economic sources for the family.
