Reg Regensburg
Rem Rembrandt
Ren Renault
repr. reprint
repub. republished
Rer Rochester
ResL&C Research Library & Collection
ResP Research Press
ReyM Reynolds Metals
Rf Reckendorf
Rg Rightangle
RG Regnery Gateway
R&G Rittner & Goupil
RH Random House
Ri Remondini
RIAI Royal Institute of the Architects of Ireland
RIBA Royal Institute of British Architects, London, or RIBA
Publications
RIBADC Royal Institute of British Architects Drawings Collection
RIBAHG Royal Institute of British Architecture, Heinz Gallery
Rik Rikoyosha
RiP Riverside Press
Riv Rivages
RKP Routledge & Kegan Paul
Rl Riegel
RM Rijksmuseum
Rn Rassegna
Rni Rimini
R.NJ Ridgewood, NJ
R-P Rousseau-Pallez
Ro Rome
RO Rivers Oram
Roe Roether
Roh Rohrer
Ron Rondelet
Ros Rosenheim
RosV Rosenheimer Verlagshaus
Rot Rotterdam
Rou Routledge
RP The Rutland Press
R&P Roycroft & Place
Rq Remquet
Rr Reimer
RS Redhill, Surrey
RSC Rocca San Casciano
Rs Raybois
Rt Rockport
RT Riker, Thorne
RTWCSLHG Royal Tunbridge Wells Civic Society Local History Group
Ru.NJ Rutherford, New Jersey
RUP Rutgers University Press
Rut Rutland
R-V Residenz-Verlag
Rw Roundwood
Ry Regnery
S VEB E. A. Seemann Buch- und Kunstverlag, or VEB Seemann
Sa Salamanca
SA Stadtarchiv
SAC Scottish Arts Council
SACl Scottish Arts Club
SAHGB Society of Architectural Historians of Great Britain
Sal Salimbeni
SAL Society of Antiquaries of London
Salo Salomoni
SAM Swedish Architectural Museum (Arkitecturmuseet)
San Sansoni
SaP Sans Pareil
Sar Santander
Sas Sagapress
Say Sayer
SB Saqi Books
SB.CA Santa Barbara, CA
SBG Selbstv. d. Braunschweigischen Geschichtsvereins