By Schumann, H., Walshe, M.
By Herfarth, H., Feagan, B.G., Fölsch, U.R., Schölmerich, J., Vatn, M.H., Zeitz, M.
By Gans, Roma, Keller, H.
By Winstone, H.
By Gütlich, P., Fitzsimmons, B.W., Ruffer, R., Spiering, H.
By Oria, M., Raffin, J., Perry, G.A., Barnes, H.
By Ibach, H., Lueth
By Tanner, James M., Healy, Michael J. R., Goldstein, H., Cameron, N.
By Foote, H., Keys, J.
By Branley, Franklyn M., Keller, H.
By van der Goot, H.
By Bolwell, L. H., H., L.
By Tate, Joan, Leetham, H.
By Wolfflin, Heinrich, Grieve, A., H.
By Innis, H.
By Beck, A. H. W., Ahmed, H.
By Cicero, Sutton, E. W., Rackham, H.
By Wylie, William Derek, Churchill-Davidson, H.C., H.
By Eggers, Reinhold, Gee, H.
By Zola, Émile, Ellis, H.
By Miller, Alice, Hannum, H.
By Myint, H.
By Ross, Prof. Alistair, Fulford, J, Hutchings, Merryn, Schmitz, H., Bottomley, Jane
By Rybakov, Anatolii, Shukman, H.
By Belcher, H., Swale, E., Culture Collection of Algae and Protozoa
By Ramsden, H.
By Mann, A., Rich, H.
By Jacobs, B., Hjalmarsson, H., Basbanes, Nicholas A.
By Twist, H.