A = Pat Adlaf (ID'd by Dolores Kenney)
B = ?
C = ?
D = ? (well, who is Santa's helper?)

photographer unknown, no markings on the photo or its setmates to indicate the year

A = ?
E = ?
(identification of the kids would be a bonus)

photographer unknown, no markings on the photo or its setmates to indicate the year

F = ?
(identification of the kids would be a bonus)

photographer unknown, no markings on the photo or its setmates to indicate the year

G = Julie Hertzler (Sandy Angelos' spouse; ID'd by Milt Levenberg)
J = ?
K = ?
L = Sandy Angelos (I.D. by Russ Johnson, Herb Golinkin)
Z.L. = Zafra Lerman
R.S. = Rajashree Sen

photographer unknown, no markings on the photo or its setmates to indicate the year

M = ?
N = ?
O = Marilyn Kramer (I.D.'d by Gail Wilkening)

photographer unknown, no markings on the photo or its setmates to indicate the year

Robert McGorrin (ID'd by Dolores Kenney, Keith Meyer)
P = Marlene McGorrin (ID'd by Keith Meyer)

photographer unknown, no markings on the photo or its setmates to indicate the year

Q = ?
R = ?

photographer unknown, no markings on the photo or its setmates to indicate the year

S = ?
R.S. = Rajashree Sen?
T = Lary Satek (ID'd by Herb Golinkin)
U = ?
Speaker = Roy Bible (tentative I.D. by Russ Johnson, Herb Golinkin)

photographer unknown, no markings on the photo or its setmates to indicate the year

W = Donald Showalter (ID'd by Veronica Reichert)
X = C. marvin Lang (ID'd by Veronica Reichert)

Is this at Loyola's Flanner Hall? The back wall kind of looks like part of the main lecture hall there.

Are people W and X the same as people B and A, respectively, in this Chemistry Day 1991 gallery? https://chicagoacs.starchapter.com/gallery.php?id=66

photographer unknown, no markings on the photo or its setmates to indicate the year

L: Robert McGorrin (ID'd by Dolores Kenney, Keith Meyer)
R: Marlene McGorrin (ID'd by Keith Meyer)

L (each) = Donald Showalter (ID'd by Veronica Reichert)
R (each) = C. marvin Lang (ID'd by Veronica Reichert)

L = Donald Showalter (ID'd by Veronica Reichert)
R = C. marvin Lang (ID'd by Veronica Reichert)

L = Donald Showalter (ID'd by Veronica Reichert)
R = C. marvin Lang (ID'd by Veronica Reichert)