5
by Kaplan, L. D.
Published in Tellus (1961)
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7
8
9
by Fonarev, A.M., Kaplan, L.E.
Published in Enfance (1988)
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11
12
13
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15
by NIELSEN, J. B. K., KAPLAN, L.
Published in J. Antibiot. (1989)
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18
by Kaplan, L. D., Connes, J., Connes, P.
Published in ApJL (1969)
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19