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HCR Info Files - Bugs
HCR Info Files - Fish, amphibians, reptiles, water life
HCR Info Files - Geological Miscellany
HCR info files - Geomorphology and Pleistocene
HCR Info Files - Mammals
HCR info files - Plate tectonics, structures
Illustrations - general
Illustrations - mammals
Letters from contributors and readers, first edition
Original manuscript sample pages