Machkova, M. Study of mountain karst system functioning by tracer techniques. София: 2000 p. 24-28,.
Machkova, M. Study of mountain karst system functioning by tracer techniques. София: 2000 p. 24-28,.
Machkova, M. (2000) Study of mountain karst system functioning by tracer techniques, София: p. 24-28,.
Machkova, M. (2000). Study of mountain karst system functioning by tracer techniques. (On the example of the Nastan-Trigradska system). София: p. 24-28.
Machkova M. Study of mountain karst system functioning by tracer techniques: (On the example of the Nastan-Trigradska system). София: 2000. p. p. 24-28.