Journal of Research of the U.S. Geological Survey

1978. V. 6 № 2,3,4,5,6

1977. V. 5 № 1,2,3,4,5

1976. V. 4 № 1,2,3,4,5,6

1975. V. 3 № 1,2,3,4,5,6

1974. V. 2 № 1,2,3,4,5,6

1973. V. 1 № 1,2,3,4,5,6