Vahnina , M. N. (2002). The ecology of Russian cities in the north. Vorkuta industrial region. Записки Горного института, 150(1), 155-158. извлечено от https://pmi.spmi.ru/pmi/article/view/9555

Vahnina , M. N. (2002). The ecology of Russian cities in the north. VORKUTA industrial region. Journal of Mining Institute, 150(1), 155-158. Retrieved from https://pmi.spmi.ru/pmi/article/view/9555