Petrograph
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Link to all Petrographs

2010 and newer Petrographs
2000 - 2009 Petrographs
1990 - 1999 Petrographs
1989 | 1988 | 1987 | 1986 | 1985 | 1984 | 1983 | 1982 | 1981 | 1980
1970 - 1979 Petrographs
1960 - 1969 Petrographs
1957 - 1959 Petrographs
Petrograph Evolution video

1989



January


February

March

April

May

June & July
 
August

September

October

November

December

1988



January


February

March

April

May

June

July & August

September

October

November

December

1987



January


February & March


April

May

June
 
August

September

October

November

December

1986



January


February

March

April

May

June

July & August

September

October

November

December

1985



January


February

March

April

May

June
 
August

September

October

November

December

1984



January


February
 

April

May

June

July & August

September

October

November

December

1983



January


February

March

April

May

June

July & August

September

October

November

December

1982



January


February

March

April

May

June
 
September

October

November

December

1981



January


February

March

April

May

June

July & August

September

October

November

December

1980



January


February

March

April

May

June

July & August

September

October

November

December

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