The visual cells in vertebrates, chiefly in necturus maculosus

[21] Gegenbaur C., 1898, VERGLEICHENDE ANATOM, V1

[22] GOTTSCHE CM, 1837, ARCH ANAT PHYSL WISS, pR8

[23] GOTTSCHE CM, 1836, CHIRURG PHARM, V2, P40

[24] GRADENIGO G, 1885, ALLG WIENER MED ZEIT

[25] GRANDRY M, 1868, B ACAD ROYALE BELG 2, V25, P304

[26] GREEF R, 1900, GRAEFE SAEMISCH HDB, V1

[27] Grenacher H., 1879, UNTERSUCHUNGEN SEHOR

[28] HANOVER A, 1840, ARCH ANAT PHYSL WISS, P320

[29] HELD H, 1904, ABHANDL MATH PHYS KL, V29, P145

[30] HENLE J, 1839, ARCH ANAT PHYSL WISS, P170

[21] Gegenbaur C., 1898, VERGLEICHENDE ANATOM, V1

[22] GOTTSCHE CM, 1837, ARCH ANAT PHYSL WISS, pR8

[23] GOTTSCHE CM, 1836, CHIRURG PHARM, V2, P40

[24] GRADENIGO G, 1885, ALLG WIENER MED ZEIT

[25] GRANDRY M, 1868, B ACAD ROYALE BELG 2, V25, P304

[26] GREEF R, 1900, GRAEFE SAEMISCH HDB, V1

[27] Grenacher H., 1879, UNTERSUCHUNGEN SEHOR

[28] HANOVER A, 1840, ARCH ANAT PHYSL WISS, P320

[29] HELD H, 1904, ABHANDL MATH PHYS KL, V29, P145

[30] HENLE J, 1839, ARCH ANAT PHYSL WISS, P170