Montana Flumes are a modification of the Parshall Flume; thus, references for the Parshall Flume are frequently relevant for the Montana Flume.  References for both are listed below.

Parshall Flume Standards

• ASTM D1941-91 (Reapproved 2013) Standard Test Method for Open Channel Flow Measurement of Water with the Parshall Flume
• ISO 9826:1992 Measurement of Liquid in Open Channels - Parshall and SANIIRI Flumes
• JIS B7553 Parshall Flume Type Flowmeters

Parshall Flume Articles / Books

• Common Methods of Measuring Water as Practiced in Western States, State of Nevada, State Engineer's Office, 1986
• Correction for Settlement in Submerged Parshall Flumes, Journal of Irrigation and Drainage Engineering, Vol. 120, No. 3, May, 1994

• Design and Calibration of Submerged Open Channel Flow Measurement Structures.  Part 2:  Parshall Flumes, Report WG31-3, Utah Water Research Laboratory, Utah State University, February 1967

• Discharge Correction for Longitudinal Settlement of Parshall Flumes, Transactions of the ASAE, Vol. 32, No. 5, 1989 

• Discharge Measurement Structures, 3rd Edition, International Institute for Land Reclamation and Improvement, Publication 20, 1989
• Equations for Computing Submerged Flow in Parshall Flumes, Bureau of Reclamation, Denver
• Equation for Submerged Sharp-Crested Weirs Found Applicable to 6-Inch Parshall Flume, Civil Engineering, Vol. 23, No. 6, June 1953
• Laboratory Investigations of Submerged Flow in Selected Parshall Flumes, Utah Water Research Laboratory, Utah State University, 1966

• Measurement and Computation of Streamflow, Vol. 1 – Measurement of Stage and Discharge, US Geological Survey Water Supply Paper 2175, 1982

• Measuring Water with Parshall Flumes, Report PR-WR6-4 / EC-323, Utah Water Research Laboratory, Utah State University, 1966 
• Parshall Flume Staff Gauge Location and Entrance Wingwall Discharge Calibration Corrections, Utah State University, 2009

• Performing Quality Flow Measurements at Mine Sites, U.S. Environmental Protection Agency, Office of Research and Development, EPA/600/R-01/043

• Results of Parshall Flume Test, Journal of Irrigation and Drainage Engineering, Vol. 120, No. 2, March / April 1994

• Settlement and Submergence Adjustments for Parshall Flume, Journal of Irrigation and Drainage Engineering, Vol. 121, No. 5, 1995

• Sewer Flow Measurement A State-of-the-Art Assessment, U.S. Environmental Protection Agency, Municipal Environmental Research Laboratory, EPA/600/2-75-027, November 1975

• Submerged Flow in Parshall Flumes, Bureau of Reclamation

• Submerged Parshal Flumes of Small Size, Utah Water Research Laboratory, Utah State University, 1965

• The Parshall Flume:  Instructions for Installation and Table of Discharge, State Engineer of Colorado

• Water Measurement Manual, 3rd Edition, United States Department of the Interior, Bureau of Reclamation

Montana Flume Standards

• MT 9127 (AG) Montana (Short Parshall) Flume (Part 1)

• MT 9128 (AG) Montana (Short Parshall) Flume (Part 2)

Montana Flume Articles

• Effects of Submergence in Montana Flumes, Utah State University, May 2010

• Montana Flume Flow Corrections Under Submerged Flow, Journal of Irrigation Drainage Engineers, June 2012

User's Manual

• Montana (Short Parshall) Flume User's Manual