Helium and radio-activity in rare and common minerals.

[1] KITCHIN, 1906, CHEM SOC T, V89, P1570

[2] MACLENNAN, 1907, PHIL MAG, V14, P760

[3] RAMSAY, 1897, ROY SOC P, V60, P444

[4] TRAVERS, 1898, ROY SOC P, V64, P141

[5] 1907, CHEM SOC P, V91, P1593

[6] 1903, VERHAND DTSCH PHYS G, V5, P72

[7] 1905, ROY SOC P 0302

[8] 1903, PHIL MAG JUN

[9] ROY SOC P A, V78, P152

[10] ROY SOC P A, V80, P56

[1] KITCHIN, 1906, CHEM SOC T, V89, P1570

[2] MACLENNAN, 1907, PHIL MAG, V14, P760

[3] RAMSAY, 1897, ROY SOC P, V60, P444

[4] TRAVERS, 1898, ROY SOC P, V64, P141

[5] 1907, CHEM SOC P, V91, P1593

[6] 1903, VERHAND DTSCH PHYS G, V5, P72

[7] 1905, ROY SOC P 0302

[8] 1903, PHIL MAG JUN

[9] ROY SOC P A, V78, P152

[10] ROY SOC P A, V80, P56