"voucher reference" is a correct and usable phrase in written English.
It can be used when referring to a specific code or identifier relating to a voucher or coupon. For example: "Please enter the voucher reference to redeem your discount."
Voucher specimens (voucher references numbers: MAPRI/NB-53a-g) were deposited at the herbarium of the institute.
Additional file 1: Table S1 lists all 238 samples used in the present work with their extraction codes, voucher references, localities and GenBank accession numbers KC190516-KC1911511).
The plant was identified at the Scientific Institute of Rabat by Prof. M. Fennane, and the specimen was deposited in the Scientific Institute herbarium under the voucher specimen reference N° RAB78140.
Plant identification and voucher specimen referencing were done at the Institute of Medical Research and Medicinal Plants Studies (IMPM) Herbarium, Yaoundé, Cameroon, by a botanist.
Identification was done by a botanist, Dr. Tsabang Nole of the Institute of Medical Research and Medicinal Plants Studies (IMPM), Yaoundé, Cameroon with voucher specimen references as follows: M. indica (TN6225), P. guajava (TN6226), C. papaya (TN6227), C. citratus (TN6228), C. sinensis (TN6229), O. gratissimum (TN6230).
But there is a promise to "stop proposals to turn Medicare into a voucher system", a reference to one version of Romney/Ryan proposed reforms.
In most cases, the whole specimen was stored as a morphological voucher for future reference (Table S1).
Of the 301 tree morphospecies, 254 could be matched to a reference voucher with an accepted species name (94% of the inventoried individuals).
A reference voucher number RKA/BOT/Sept.10-12 RKA/BOT/Sept.10-12e plant samples and preserved in Department of Botany.
The plant identity was confirmed by Dr. Marlene Cross, Department of Biology, Mercyhurst University, and a reference voucher specimen (Reference number: TREC He- 00818) was deposited in the Herbarium of the Tom Ridge Center, Erie, Pennsylvania [ 23].
Plant parts were locally collected and reference voucher specimens were deposited at Faculty of Traditional Thai Medicine, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
