PT  - JOURNAL ARTICLE
ED  - , 
TI  - SCIENTIFIC NOTES AND NEWS
AID  - 10.1126/science.89.2321.578
DP  - 1939 Jun 23
TA  - Science
PG  - 578--580
VI  - 89
IP  - 2321
4099  - http://science.sciencemag.org/content/89/2321/578.short
4100  - http://science.sciencemag.org/content/89/2321/578.full
SO  - Science1939 Jun 23; 89