Sentence examples for have been traced from inspiring English sources

Valentine cards have been traced back to around 1400.

Virtually all of them have been traced to northern Germany.

The rest have been traced piece by piece.

Unconfirmed reports from webmasters say that the hacks have been traced to Beijing and government offices.

The origins of shiitake cultivation have been traced back thousands of years to China and Japan.

In California, some of the earliest introductions have been traced to shipments of waterlilies.

These activities have been traced to the C-terminal tripeptide Lys-Pro-Val (KPV).

Many ailments due to inborn errors of metabolism have been traced to specific genetic defects.

Customers of the Estonian branch have been traced to Russia, Azerbaijan and Ukraine.

Nickel rashes have been traced to other common products including some jewelry, eyeglass frames and zippers.

Some of the intrusions have been traced to computers in China.