@book{bhlitem30987, title = {The visual pigments }, copyright = {No known copyright restrictions as determined by scanning institution}, url = {https://www.biodiversitylibrary.org/item/30987}, note = {https://www.biodiversitylibrary.org/bibliography/7266}, publisher = {London, Methuen, [1957]}, author = {Dartnall, Herbert J. A.}, year = {1957}, pages = {234}, keywords = {Visual pigments|}, }