PT  - JOURNAL ARTICLE
AU  - Steven V. Mann
AU  - Robert W. Seijas
TI  - Bid-ask spreads, NYSE specialists, and NASD dealers
AID  - 10.3905/jpm.1991.409381
DP  - 1991 Oct 31
TA  - The Journal of Portfolio Management
PG  - 54--58
VI  - 18
IP  - 1
4099  - https://pm-research.com/content/18/1/54.short
4100  - https://pm-research.com/content/18/1/54.full