After all, Russia is a big country, said Dr. Surkov. The workshop was led by the following trainers in the Rostov region: Feodor Surkov, Natasha Lihktanskaya, Natalia Petkova, and Olga Zhilevich. students with clinometer Olga Zhilevich, a hydrology trainer, has been working with Dr. Surkov for a number of years on joint American and Russian school exchange programs for ecological studies.