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- [22] 9TH ANNUAL CONTROL VALVE UPDATE I&CS-INDUSTRIAL AND PROCESS CONTROL MAGAZINE, 1985, 58 (01): : 87 - 90
- [24] 9TH BNCS ANNUAL TECHNICAL CONFERENCE MACHINERY AND PRODUCTION ENGINEERING, 1975, 127 (3269): : 104 - 107
- [29] REPORT ON 9TH PLANSEE SEMINAR INTERNATIONAL JOURNAL OF POWDER METALLURGY, 1977, 13 (04): : 313 - 313