General Liberal Reformed Association in Groningen, P6
"Amstleven," P47, T92
Botje D.H., P29, T58
Botje E., P28
Botje-Ensing company/ Olthof brothers, P21
Biessum, Gebroeders van, T53
Building materials trade, T9, T73, T113
Bracht H., P23
Coöperatie "De Toekomst, P27
Coöp. Ver. tot Stichting en Exploitatie van eigen goederenloodsen, P50
United Baptist Church in Groningen, P7
Baptist congregation, P3
Drachtster Stoomtimmerfabriek Houthandel, P53, T103
Duk J. A., T118
Dijk G. van, P58
St. Eelder Woningbouw, P35, P65, T71, T75
Geveke L., P14, P15, P45, P52, T32, T37, T38, T46, T87, T88, T93
Gotto, T112,
Groeneveld R., T84, T97
Groningen, w.b.v., P42, P55, P63, P68, T3, T4, T5, T17, T43, T49, T69, T102, T106
Groningse Blindenorganisatie, T85
"Gruno" w.b.v., P2, T2, T6, T7, T21, T22, T57, T80
St. Harener Woningbouw, P40, P43, P49, P57, P59, P62, P67, T76, T82, T83, T96, T104, T107, T108, T109, T111
Heel G,J. van, T14, T48,
Heikens H.J., P5, T25
Timber trade N.V., T62
Huisveld J., T61
Idema, T12
Jans G. T81
Leefsma, P4
Society for the Improvement of Housing Conditions, T19
Mees, M, P26
Mengerink, B. J., T27
Mesdag and Sons, P8, T29
Conservation of monuments, P20
Nieboer, P41, T47
Nieuwe Pekela, (w.b.v.) P3
Nieuwe Pekela, Housing Foundation, T66
Noboma, P48, P54, P56, P60, P69, T86, T91, T100
Nijland, C. J. P44, T90
"Our own hearth," (building society) P1
Panman, P46, T55, T98
Paul-Mees B. C., P33, T70, T72
Posthumus K, T115
Pro Juventute, P9, P22, T33, T44
Council of Labor, P17
Rasker G., P32, P67
Remonstrans Gasthuis, T95
Kampinga S, P37, T79
Kerzaam G. T78, T101
Kloosterman W. / Kuipers P., T50
Koops, the ladies, P11, T26
Kuilman R. P12
Kuilman and Geveke, T30
Kunst W. P16, P18
Spil, J. A. ter, T23
Steegstra L, P64, T60
Steenhuis D. T20
Steenhuis D. / Wieringa T., T16
Steam and Carpentry Works, T52
Tiddens P. P51, T99
Thomassen W. H., T10
Consumers association " The Future", T18
Viersen N. V., T13
Warners, T68
Orphan A. v.d., P66, T105
WEEVA, (w.b.v.) P25, T51, T54
Wicheren-Muller, P36, T94
Wieringa J. E., P10, P13
Wolda R. T., T89
Housing construction for the Market, P19, T56
Zuidema W. L. G., T15
Association for the care of the mentally ill, P34
Association for the care of the mentally ill in Groningen, T74