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84. Hecht, S. The nature of the latent period in the photic response of Mya 

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93. Hecht, S., and G. Wald. The influence of intensity on the visual functions of 

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96. Henke, K. Die Lichtorientierung und die Bedingungen der Lichtstimmung 

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98. Herter, K. Versuche iiber die Phototaxis von Nereis diversicolor, O. F. 

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