1964, 20(3): 261-269.
DOI: 10.7498/aps.20.261
CSTR: 32037.14.aps.20.261
1964, 20(3): 276-280.
DOI: 10.7498/aps.20.276
CSTR: 32037.14.aps.20.276
1964, 20(3): 281-284.
DOI: 10.7498/aps.20.281
CSTR: 32037.14.aps.20.281
1964, 20(3): 285-286.
DOI: 10.7498/aps.20.285
CSTR: 32037.14.aps.20.285


