[Comparison of the state of dental health in state farm workers at Elk in 1974 and 1977].
D004245:DMF Index; D003753:Dental Health Surveys; D006801:Humans; D011044:Poland; D012424:Rural Population
Porównanie stanu uzebienia pracowników Zjednoczenia PGR w Ełku badanych w 1974 i 1977 r.