-
1LlyfrCyhoeddwyd 1971“...British Association for the Advancement of Science. Section F (Economics)...”
-
2LlyfrCyhoeddwyd 1973“...British Association for the Advancement of Science. Section F (Economics)...”
-
3LlyfrCyhoeddwyd 1970“...British Association for the Advancement of Science. Section F (Economics)...”
-
4LlyfrCyhoeddwyd 1992“...British Association for the Advancement of Science. Section F (Economics)...”
-
5LlyfrCyhoeddwyd 1968“...British Association for the Advancement of Science. Section F (Economics)...”
-
6LlyfrCyhoeddwyd 1986“...British Association for the Advancement of Science. Section F (Economics)...”
-
7LlyfrCyhoeddwyd 1975“...British Association for the Advancement of Science. Section F (Economics)...”
-
8LlyfrCyhoeddwyd 1968“...British Association for the Advancement of Science. Section F (Economics)...”
-
9LlyfrCyhoeddwyd 1974“...British Association for the Advancement of Science. Section F (Economics)...”
-
10Llyfrgan Smyth, Robert Leslie“...British Association for the Advancement of Science. Section F (Economics)...”
Cyhoeddwyd 1969
-
11LlyfrCyhoeddwyd 1976“...British Association for the Advancement of Science. Section F (Economics)...”
-
12LlyfrCyhoeddwyd 1977“...British Association for the Advancement of Science. Section F (Economics)...”
-
13LlyfrCyhoeddwyd 1971“...British Association for the Advancement of Science. Section F (Economics)...”
-
14LlyfrCyhoeddwyd 1968“...British Association for the Advancement of Science. Section F (Economics)...”
-
15LlyfrCyhoeddwyd 1982“...British Association for the Advancement of Science. Section F (Economics). Meeting...”
-
16Trafodyn Cynhadledd LlyfrCyhoeddwyd 1972“...British Association for the Advancement of Science. Section F (Economics)...”