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- [3] PROCEEDINGS OF THE 99TH ANNUAL CONGRESS APRIL 4 TO 6, 1979 - PRESIDENTIAL-ADDRESS TRANSACTIONS OF THE OPHTHALMOLOGICAL SOCIETIES OF THE UNITED KINGDOM, 1979, 99 (APR): : 1 - 3
- [5] PROCEEDINGS OF THE 94TH ANNUAL-MEETING OF THE FLORIDA STATE HORTICULTURAL SOCIETY - PRESIDENTIAL-ADDRESS PROCEEDINGS OF THE FLORIDA STATE HORTICULTURAL SOCIETY, 1981, 94 : R13 - R14
- [6] PRESIDENTIAL-ADDRESS DELIVERED BY HARDY,D.A. AT THE 38TH ANNUAL APPITA GENERAL CONFERENCE APPITA, 1984, 37 (07): : 541 - 544
- [7] PROCEEDINGS OF THE 95TH ANNUAL-MEETING OF THE "FLORIDA-STATE-HORTICULTURAL-SOCIETY - PRESIDENTIAL-ADDRESS PROCEEDINGS OF THE FLORIDA STATE HORTICULTURAL SOCIETY, 1982, 95 : R11 - R11
- [8] PROCEEDINGS OF 96TH ANNUAL CONGRESS APRIL 21 TO 23, 1976 - PRESIDENTIAL-ADDRESS - UNFINISHED STORY TRANSACTIONS OF THE OPHTHALMOLOGICAL SOCIETIES OF THE UNITED KINGDOM, 1976, 96 : 1 - 5
- [9] WATER-RESOURCES, A GLOBAL CHALLENGE - PRESIDENTIAL-ADDRESS TO THE 24TH ANNUAL CONFERENCE OF AWRA, 1988 WATER RESOURCES BULLETIN, 1988, 24 (06): : R3 - R4