Handbook of Medicinal Herbs

PEPPakistan Encyclopedia Planta Medica (1986)
PH2Gruenwald et al. (2000)
PHMPhytomedicine (vol. 3, 1996)
PHRPDR for Herbal Medicine, 1st ed., Fleming, et al. (1998)
PIPSchilcher (1997)
PJBProtocol Journal of Botanical Medicine, (vol. 1, no. 1, 1995; since terminated)
PMPlanta Medica (56, 1990)
PNCWilliamson and Evans (1989)
PRPhytotherapy Research (vol. 4, 1990)
PSPlant Science (Ireland) (vol. 75, 1991)
QRNMQuarterly Review of Natural Medicine
RATRobbers and Tyler (1999)
RFWWeiss (1988)
RINRinzler (1990)
RYM Roig y Mesa (1928)
SABSabinsa (1998)
SARSchultes and Raffauf (1990)
SHBBuhner (2000)
SFFoster (1996)
SF2Foster (1998)
SHTSchulz, Hansel, and Tyler (1998)
SKJJain (1991)
SKYLininger et al. (1998)
SNScience News (followed by number and page)
SPICharalambous (1994)
SUWSuwal (1976)
SYNChallem, Berkson, and Smith (2000)
TA D Tucker and Debaggio (2000)
TA N Tanaka (1976)
TGPDuke (1997)
TIBKletter and Kriechbaum (2001)
TMATime-Life (1996)
TOMCrellin and Philpott (1990)
TOX Keeler and Tu (1991)
TRAGermosén-Robineau (1997)
UPWBurkill (1985–2000)
USAUSDA's Ag Handbook 8 and sequelae
USDUSDA’s nomenclature database
VA G Van Wyk and Gericke (2000)
VVGVan Wyk, Van Oudtshoorn, and Gerike (1997)
WA F White et al. (2000)
WAG Wright and Gaby (1999)
WA M White and Mavor (1998)
WBBWatt and Breyer-Brandwijk (1962)
WERWerbach (1993)
WHOWorld Health Organization (1999)
WICWichtl (1984)
WOI Council of Scientific and Industrial Research (CSIR) (1948–1976)
WO2The Wealth of India, revised; three new volumes published (1985–1992)
WO3The Wealth of India, first supplement series (2000)
XAs a prefix followed by a big number, a PubMed reference citation (e.g., X123456)