Petrograph
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Link to all Petrographs

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1979 | 1978 | 1977 | 1976 | 1975 | 1974 | 1973 | 1972 | 1971 | 1970
1960 - 1969 Petrographs
1957 - 1959 Petrographs
Petrograph Evolution video

1979



January


February

March

April

May

June

July

August & September

October

November

December

1978



January


February

March

April

May

June

July
 
September

October

November

December

1977



January


February

March

April

May

June

Missing first 4 pages

July

August
 

October

November

December

1976



January


February

March

April

May

June

July & August

September

October

November

December

1975



January


February

March

April

May

June

July & August

September

October

November

December

1974



January


February

March

April

May

June

July & August

September

October

November

December

1973



January


February

March

April

May

June

July

August

September

October

November

December

1972



January


February

March

April

May

June

July

August

September

October

November

December

1971



January


February

March

April

May

June

July

August

September

October

November

December

1970



January


February

March

April

May

June

July

August

September

October

November

December

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