1.  Marriage Record:

2.  1900 Census Every-Name-Index/Images (online at Ancestry.com):  can't find Otis (or his sister, Elvene); he's not with his parents.

3.  1910 Census Every-Name-Index/Images (online at Ancestry.com, Image #17 of 19):  New Haven Twp., Olmsted Co., MN, Roll T624_713, p. 100A, SN 9A, SD 1, ED 109, enumerated 30 Apr 1910, official enumeration date 15 Apr 1910 (extracted by Diana Gale Matthiesen):

1910:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

23

24

26

27

28

29

147

Rasmussen Otis

Head

M

W

28

M1

MN

DK

DK

Eng

General Farm

OA

Y

Y

O

M

F

135

_________ Emma

Wife

F

W

24

M1

3

3

2

MN

Ger

WI

Eng

none

Y

Y

_________ Burton

Son

M

W

3

S

MN

MN

MN

_________ Clarence

Son

M

W

2

S

MN

MN

MN

_________ Hans

father in law

M

W

69

S

DK

DK

DK

1866

nat

Eng

none

Y

Y

_________ Wilhelmena

mother in law

F

W

62

M1

41

9

7

DK

DK

DK

Eng

none

Y

Y

4.  1920 Census Every-Name-Index/Images (online at Ancestry.com, Image #9 of 19):  Pine Island No. 1, New Haven Twp., Olmsted Co., MN, Roll T625_847, p. 98A, SN 5A, SD 156, ED 109, enumerated 19/20/22 Jan 1920, official enumeration date 1 Jan 1920 (extracted by Diana Gale Matthiesen):

1920:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

1

2

3

4

5

6

7

8

9

10

11

12

13

14

16

17

18

19

20

21

22

23

24

25

26

27

28

29

*

Fm

95

97

Rasmussen Otis J

Head

O

F

M

W

39

M

Y

Y

MN

DK

Danish

DK

Danish

Y

Farmer

General farm

Em

73

_________ Emma A

Wife

F

W

35

M

Y

Y

MN

Ger

German

WI

Y

None

_________ Clarence

Son

M

W

11

S

N

N

N

MN

MN

MN

None

_________ Harold

Son

M

W

9

S

Y

Y

Y

MN

MN

MN

None

_________ Eunice

Dau

F

W

6

S

N

Y

Y

MN

MN

MN

None

_________ Maurice

Son

M

W

4

S

MN

MN

MN

None

_________ Wilhelminia

Mother

F

W

72

Wd

1879

pa

Y

Y

DK

Danish

DK

Danish

DK

Danish

None

*Pine Island No. 1

5.  1930 Census Every-Name-Index/Images (online at Ancestry.com, Image #7 of 36):  New Haven Twp., Olmsted Co., MN, Roll 1110, p. 67A, SN 4A, ED 55-14, SD 13, enumerated 5 Apr 1930, official enumeration date 1 Apr 1930 (extracted by Diana Gale Matthiesen):

1930:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).
3	4	5	6	7	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	30	32
42	42	Rasmussen Otis Jr	Head	O	Y	M	W	47	M	24	N	Y	MN	DK	DK				Y	Farm	General	O	Y	N	42
		_________ Emma	Wife			F	W	43	M	20	N	Y	MN	Ger	MN				Y	None
		_________ Wilhemena	Mother			F	W	82	WD		N	Y	DK	DK	DK	Danish	before 1900	Na	Y	None