)٦٤( Sen Gupta, A. K. &quot; Geotextiles: opportunities for natural - fibre products &quot; International Trade Forum, January-March 1991, p. 12.
46/ Sen Gupta, A.R. &quot; Geotextiles: opportunities for natural-fibre products &quot; International Trade Forum, январь-март 1991 года, стр. 12.