Permanent

63

1960s

52

1970s

9

1950s

4

1980s

1

1964

14

1963

12

1969

10

1965

7

1962

5

1961

4

1970

4

1974

4

1971

3

1972

3

1959

2

1966

2

1968

2

1951

1

1954

1

1967

1

1977

1

1980

1

Photo - Positive

63

IAEA

20

UNESCO

20

Payne, Bryan R.

6

UKAEA

6

Almasy, P.

5

Edelmann, Michèle

5

Argonne

4

UN Photo

4

GAEC

2

Kleijn, J. H. A.

2

USIS PHOTO

2

AMF International Ltd

1

Battelle Memorial Inst.

1

Bernheim, Alfred

1

Davies, D

1

Dinger

1

Foto Schikola

1

Goldberger

1

Hills, C.

1

Lajoux, Dominique

1

Pfeifer, Heinz

1

Rice Jr.

1

Roger, Dominique

1

Scheidegger, Ernst

1

Schmidt, Gerhard

1

Schwab, Eric

1

Tessore, A.

1

USAEC

1

Hydrology

61

Austria

10

United States of America

9

Israel

7

United Kingdom of Great Britain and Northern Ireland

6

Egypt

4

Bolivia

3

Brazil

3

France

3

Greece

3

Kenya

2

Tunisia

2

Turkey

2

Algeria

1

Australia

1

Hydrology Equipment Japan

1

Hydrology; Kenya

1

India

1

Indonesia

1

Libya

1

Netherlands

1

Nigeria

1

Pakistan

1

Somalia

1

Sudan

1

Uganda

1

IAEA

20

UNESCO

20

UKAEA

6

Argonne

4

UN Photo

4

GAEC

2

USIS PHOTO

2

AMF International Ltd

1

Battelle Memorial Inst.

1

Foto Schikola

1

USAEC

1

Landscape

41

Portrait

22