Geological Sketches (1870), ch. 9, p. 234 https://babel.hathitrust.org/cgi/pt?id=hvd.32044018968388;view=1up;seq=252
Louis Agassiz: Citáty anglicky
Geological Sketches (1870), ch. 2, pp. 31–32 https://babel.hathitrust.org/cgi/pt?id=hvd.32044018968388;view=1up;seq=49
As quoted in A Dictionary of Scientific Quotations (1991) edited by Alan L. Mackay, ( p. 2 http://books.google.com/books?id=KwESE88CGa8C&pg=PA2&lpg=PA2&dq=every+scientific+truth+goes+through+three+stages+first+people+say+it+conflicts+with+the+bible+next+they+say+it+had+been+discovered+before+lastly+they+say+they+always+believed+in+it&source=web&ots=DKSjGVklFG&sig=TGpJ6LSI9CE4s7Nu8wUiGAq3rgI)
Methods of Study in Natural History (1863), ch. 4, p. 42 https://babel.hathitrust.org/cgi/pt?id=mdp.39015065771407;view=1up;seq=56
Geological Sketches (1870), ch. 2, p. 31 https://babel.hathitrust.org/cgi/pt?id=hvd.32044018968388;view=1up;seq=49
Evolution and Permanence of Type (1874)
Geological Sketches (1870), ch 4, p. 98 https://babel.hathitrust.org/cgi/pt?id=hvd.32044018968388;view=1up;seq=116
Methods of Study in Natural History (1863), ch. 1, p. 7 https://babel.hathitrust.org/cgi/pt?id=mdp.39015065771407;view=1up;seq=21