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Find the missing letter F-O-R T-A-R P-U-_
R. P. F. Gregory has written:
'Photosynthesis'
'Photosynthesis' -- subject(s): Photosynthesis
Geographische Zeitschrift was created in 1895.
Physikalische Zeitschrift was created in 1899.
Physikalische Zeitschrift ended in 1945.