Sentence examples for the principal source is from inspiring English sources

The principal source is the annual population survey conducted by the GSO from 2000 [13] These surveys are based on a 3% sample drawn from the 1999 Census.

In the present case, the principal source is incomplete extension (see below).

The principal sources are 34S-depleted inputs, derived from the oxidation of pyrite within both the aquifer matrix material and the overlying mudstone deposits, and 34S-enriched anthropogenic inputs which are derived from acid rain fallout augmented by agrochemicals.

Beyond Pictland, the principal sources are the Irish annals, of which the Annals of Ulster and the Annals of Tigernach are the most reliable.

Data collection methods vary between cancer registries, but the principal sources are hospital in-patient records and pathology records.

For the age group 15 39 years, the principal sources were the regional cancer registries in England and the national cancer registries of Scotland and Wales.

The first and principal source is the oxidative pentose phosphate pathway [ 63].

Its principal source is the 1960 film of the same title about a septet of hired American guns protecting a Mexican village.

He mentioned that one of the company's principal sources is Nexrad, or Next Generation Radar, a network of a hundred and fifty-nine Doppler radar stations operated by the National Weather Service.

Principal sources are the Friesian and North Sea fields of the Netherlands and the Norwegian North Sea.

Principal sources are the Posterior Analytics, De Anima iii.6-8, Metaphysiii iii.2, vi.1, vii.10-11 .10-11 x.1-2, xix2-3, 7, xiii.9-3, Physics ii.2.